120 O E D E I Î — I I Y M E N O P T E R A .
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trochanters lilack; posterior tibiie u-ith a double row of serratures outside. Abdomen sliining and closely
piinctnredj base and apex eoarsely so.
Fig. 5 a represents the front of the head, and 5 b the fore log, shewing the curved transverse depression
near the extremity of the tibioe. Tlie antenuie are sliort, the articulation between the eighth and ninth joints
very indistinct, the ninth joint largo and kidney-shaped, and the tenth joint very minute and slender.
ORYSSUS MACULIPENNI8. (Var. Ì)
Niger, magis rugosns, puuctis prsesertim ahdomine majoribus, vertice capitis magis elevato, media parte
postica panilo concava et liE^à, tubercnlis transversis lunatis latcralibus magis distinctis ; antennis pcdibusque
nigris, femoribus rufis (in pedibus anticis subtus nigricantibus) ; alis antieis hyalinis ; costa, nubila oblonga in
cellula supera basali, alteraque versus basin marginis postici, faseiaque lata prope apicem distinete terminata
nigricantibus, alis posticis hyalinis, tertia parte apicali pallide nigricauti.
Long. corp. lin. ; expans. alar, antic, lin. 13.
Habitat; Insula; Philippinensis jMindanao diet«, partibus orientalibus. In Mus. Semper Altona;, No. .235.
OETSSUS UNICOLOE,
(Latreille, Encyclop. Method. Ins. t. viii. p. 561.)
PLATE XXII, Ere. 6.
Niger, capite thorace abdomineqne immaculatis, pnnctatus : capite supra rugoso ; antennis gracilibus nigris,
articuhs 4-7 obscure albidis ; pedibus nigris, gracilibus, genienlis, tibiisque praisertim posticis extus albidis ; alis
hyalinis stigmate brunneo, fascia media, alteraque latiori ad apicem extensa pallide fuseis.
Long. corp. lin. 4; expans. alar. lin. 6^.
Habitat ; ' Boulogne,' prope Parisias. In Mus. Britann., communic. D. Latreille (No. 611).
This species is only half the size of 0. coronaius, and the sexes are alike in colour, so that it cannot be
regarded as a variety of that species.
OETSSUS SAYI.
(Westw. Zool. Jom-iial, vol. v, p. 440 ; 0. maums, HaiTÌs, Cat. Ins. Mass, 2nd edit. ; and Treatise, p. 543, 2nd edit.)
PLATE XXI I , Ere. 7.
Niger : capite, thoraeeque punetatis ; abdomine subtiKus punctato ; vertice ad regionem ocellorum tuberculato;
facie Imeis duabus minutis abbreviatis albis inter oculos ad marginem inferiorem; labro albido ; antennis
nigiTS apice articnli tertii articulisque quarto et quinto supra albo-notatis ; pedibus nigris, apice femorum lineolaque
supera tibiali albis ; alis dimidio basali hyalinis ; dimidio apicali fuscis et ad costam obscurioribus, macula
parva substigmaticali apiceque ipso byaliniSj stigmate nigro. (Poem.)
Long. corp. foem. lin. 7i ; expans. alar, antic, lin. 11.
Habitat ; America Borealis, New Harmony. In Mus. Ilopeiano Osoniaj (olim nostr.)
A considerable number of female specimens of this species were obtained by the late Mr. Raddon, the
engraver^ from skimmings of raw turpentine imported in barrels, as collected in North America.
A male of this species from Nova Scotia (Kedman), in the British Museum, is five lines long, and seven
lines in the expansion of the fore wings ; the antennse are simple, blacky with a small white spot in front of the
third and fourth joints, near the tips; the face with two small, transverse, white lines extending from the fore
inner margin of the eyes, the knees and front of all the tibite are white : the abdomen with a small triangular
white spot at the tip above, the wings not so strongly coloured as in the female, but with the same arrangementof
colour on the submarginai vein, and in the submarginai cell.
Mil' '5
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F A M I L Y — S M I C I D ^ . 121
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ORYSSUS AlIAZONICUS. Westw.
PLATE XXII, FIG. 8.
Niger, punctatissimus : capite duplici serie tuberculorum ; antennis nigris articulis 3-7 albidis ; pedibus
piceis femoribus nigris; alis hyalinis fascia abbreviata ante, alteraqne lata pone medium fuscis.
Long. corp. lin. 3i ; expans. alar, antic, lin. 5^.
Habitat; Amazonia (Bates). In Mus. Ilopeiano Oxonice.
The head is rugose and granulated, with two rows of conical tubercles between the eyes (fig. 8«). Tlie
antenna) have the third and four following joints buff, the fourth and sixth being longer than the fifth and
seventh. The thorax is rugosely punctured, the abdomen more delicately^ the basal joint having a transverse
row of fine striolaî at its base, divided in the middle by a small polished tubercle, the remainder of the segment
being more strongly punctured than the rest of the abdomen. The legs are robust and pitchy black, the
extremity of the tibia; and the tarsi being more pitchy. The wings are hyaline, the fore wings with an abbreviated
fascia before the middle of the wing, terminating in an oval spot in the middle of the disc ; and beyond
the middle of the wing is a broad brown fascia. The vein closing the first submarginal cell is colourless between
the dark fascioe.
GENUS—DERECYETA.
(Smith, Ann. liât. Hist. 3rd Ser. vol. vi. p. 255 ; Xiphydrina, Westw. MS.)
Head subglobose, vertex swollen or convex ; eyes lateral, large, ovate ; ocelli prominent^ placed in a triangle
between the eyes ; antennie setaceous, composed of 23-26 joints, the scape shortj curved, slightly thickened
towards the apex; the first joint of the fiagellum half the length of the scape, the second as long as the scape,
third and four following joints as long as the firsts the remaining joints are each in succession shorter than the
preceding. Thorax as -wide as the head, oblong, the sides parallel ; the prothorax narrowed anteriorly into
a short neck ; the mesothorax slightly elevated in front ; the scutellum elevated ; the metatborax -with a deep
incision in the middle ; the anterior wings with one or two marginal and four submarginal cells, the marginal
cell, or cells, elongated^ "nntli a short appendix at the apex ; the first submarginal cell small, the second ol;long,
widest at the apex, the third subquadrate, the fourth extending to the apex of the wing : the second and third
cells each receive a recurrent vein a little within their base; legs slender, not compressed; the four bind
tibice bispinose at their apex ; ungues with a strong broad tooth at the base ; abdomen cylindrical, about twice
the length of the head and thorax ; the ovipositor short, and slightly exserted.
This genus is evidently identical with Brachyxiphus of Pliilippi (Stettiner Entom. Zeit. 32 Jahrg. 1871,
p. 285, pl. III), although there are several characters given by that author which differ from those which I
have observed. The maxillary palpi are described as 6-jointed, the first four joints of equal length, and the last
shorter. They are, however, figured as only 5-jointed, with the first to the fourth of equal length, and the fifth
shorter and oval (see his fig. 1 ¿). The labial palpi are described as 4-jointed, the third joint the shortest and
the last egg-shaped (see his fig'. 1 c). Of the sexes he observes—' Mannchen babe ich nicht gesehen.' His
ligures of his two species evidently, however, represent both sexes, figure 1 being a female, and figure 2 a male.
He also notices the difi'erence in the number of marginal (radial) cells in the individuals constituting his two
species, described as follows :—
1. Brachyxiplms granclkVXx. (fig. 1), niger, abdominis segmentis 3-8 aurantiacis ; antennis 26-articulatis ; alis
nigricantibus cellulis radialibus duabus. Long. corp. lOj lin.; exp. alar. 19 lin. Hah. Valdivia.
2. Brachjwijihis Jlatyies Pb, (fig. 2), niger, pedibus fla-yis ; antennis 18-articulatiSj in medio albis ; alis nigricantibus,
cellula radiali indivisa. Long. corp. fere 6 lin. ; exp. alar, antic, lin. 9. Hab. Valdivia.
Fi'om this description, and the accompanying figures, it would appear that the specimen represented in his
fig. 2, having all the appearance of a male, has only one radial (or marginal) cell; whilst his fig, 1, represented
with a short ovipositor, as a female, has two radial cells : thus differing from the specimens represented in
my plates, in which the male has two radial cells and the female only one. In this uncertainty, I hesitate in
uniting the male insect, from Chili, represented in my plate XXIII, fig. 1, having two radial cells, -n'itb
Pliilippi's female, fig. 1, from Valdivia, which has also two radial cells, although agreeing with it in colours.
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