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SPECIES 1—DEEECYRTA PICTIPENNIS. (Smitli, 1. c.)
PLATE XXIII, FIG. 2.
Oehriiceu, nitida: capite, abdominis apice, mandibnlis, antennis, podibusque nigvis; alis fuscis basi fasciiique
transversali flavo-hyalinis, antieis cellula iiniea marginali. (Fcem.)
Long, fffim. 9 - 1 0 lin. ; expans. alar, antic, lin. 18|.
I l a l j i t a t ; Amazonia, Ega (Bates). In Mns. Britanu. et Hopeiano Oxonia\
The mandibles are short, and thick, obliquely truncate, and 4-toothed (fig. 2 a) • the maxillee well developed,
t e r m i n a t e d by two membranaceous ciliatcd lobes; palpi 6-jointed, the terminal joint indistinctly constricted and
slender (fig. 2 h); tlie labium cordate, and the labial palpi 3-jointed, the last joint large and securiform (fig. 2 c);
t h e autennffi in the Oxford specimen 24-jointed (fig. 2 d), and longer than in Xiphydria : they are inserted
between the lower angles of the eyes; the head is black, the anterior half between the eyes rugose, the posterior
half of the head glossy, smooth, with a slight impression behind the ocelli; the thorax is formed as in Xiphydria,
equal to the liead in widt h ; the abdomen is of equal width with the thorax, elongate, cylindrical; each of
t h e basal segments is marked near the base on the upper side wi t h a sinuated raised line; the terminal segment
is obconic, glossy, terminating in a small horny point, beyond which the ovipositor extends to a short distance.
SPECIES 2—DEEECYRTA BICOLOR. Westw.
PLATE XXIII, FIG. 1.
N i g r a , punetatissima: abdomine eastaneo-rufo nitido ; segmento primo (fisso), secnndi disco, nltimocjue toto
n i g r i s ; antennis 26-articulatis ; pedibiis nigris ; alis brnnneo-fulvis, purpureo parum tinetis ; ceUis marginalibus
duabus. (Mas.)
L o n g . corp. lin. 9 ; expans. alar, antic, lin. 14.
H a b i t a t ; Chili. In Mus. Hopeiano Oxoniaj.
Head convex, closely covered with small punctures, two impressed longitudinal abbreviated hues between
t h e eyes, united by a transverse one behind the ocelli: the terminal joints of the antennai are gradually attenua
t e d to the tip; the mandibles (fig. 1 a) are 4-dentate, the outer tooth acute, the others obtuse ; the maxilla
(figs. 1 1 e) are terminated by two flat, rounded membranaceous cHiated lobes, with a small appendage near the
base of the inner margin ; the palpi are 6-joiuted, the basal joint short, the second and fourth the longest, the
t h i r d and fifth nearly equal, shorter, and inwardly setose : the sixth is twice constricted so as to appear 3-jointed
(figs. 1 (J, 1 e); the mentum is broadly cup-shaped, with the middle of the front margi n produced and truncate;
t h e labial paljii are 4-jointed, the two intermediate joints being the shortest, the fourth ovate; the neck is not
more than one-third of the length of the head ; the abdomen is long, narrow, and snbconvex, with the intermediate
segments transversely depressed at the base, and they have a second transverse impression close to the
h i n d margi n of eaeli; the apical segment is rounded, terminated by two broad 2-jointed appendages, between
wliich is seen the slightly exserted extremity of the male organ of generation (fig. 1 / , terminal joint seen from
below; 1 ¿7, seen from above).
SPECIES 3—DEEECYETA LUGITBRIS. Westw.
PLATE XXIII, FIG. 3.
Nig-ra, ni t ida: capite l^vi, facie et dorso thoracis pnnctatis; abdominis segmentis margine postico pieeo;
a n t e n n i s pedibusque nigris; alis fuscis, fascia pone medium flaveseente, cellula unica marginali. (Ecem.)
Long. corp. lin. 10 ; expans. alar, antic, lin. ISJ.
H a b i t a t ; Brazil. In jNIus. Reg. Holm. (F. Salilberg) etiara in Mus. W. W. Saunders.
The head is rather larger than in the first species; the abdomen gradually but slightly thickened beyond
t h e middle to the penultimate joint : the joints have a slight transverse impression at the base, and a more
d i s t i n c t sinuated one beyond the middle of each segment ; the pale fascia of the fore wing occupies the basal
half of the marginal cell, the outer half of the first, and nearly the wliole of the second submarginal cells,
aud nearly the whole of the large posteriorly adjacent cell; the central cell is oblong (not quadrate, as in
IJ. pictipeunis); the second recurrent vein is not straight, and is received nearly in the middle of the third
submarginal cell, instead of near its base, as in D.pietipennis, aud the central cell of the hind wing is much
longer than in that species.
F A M I L Y — E V A N I I D I E .
GENUS—TRIGONALYS.
(Westw. Proc. Zool. Soc. April 14, 183S, No. 28, p. 52 ; Seminota, Spinola, in Guériu Mug. de Zool. tS+o, Iiis. pi. XLI ;
Trigonalis (Kkig, baud reete). Spinola, 1. c. 1840, Ins. pi. LI I I ; Lymyaster, Shuckard, Entomologist, p. 124.)
SPECIES 1—TRIGONALYS LUGUBEIS.
(Westw. Trans. Ent. Soc. Lond. 18Ó.S, part iv. December, p. 328.)
PLATE XXIII, FIG. 4.
N i g r a , punetatissima, flavo varia; alis antieis margine costali fusco suffuso.
Long. corp. lin. 44 ; expans. alar, antic, lin. 9.
H a b i t a t ; Amazonia (Bates). In Mus. Hopeiano Oxoni».
Caput nigrum ; clypeo, macula parva ad marginem anticum oculorum, alterisque duabus suborbitalibns,
mandibulisque flavis, harum dentibus nigris ; antennie nigra;, 27-artieuIatiE ; thorax niger, collaris margine
supero, punctis duobus antieis mesonoti, alterisque duobus minutis ad latera scutelli, post-scutelli linea tenui in
medio emarginata, flavis ; abdomen segmentis postico flavo tenue marginatis, infra in medio profunde incisis ;
ala) hyalina), margine costali fusco pone stigma magis suffuso ; pedes nigri, tibiis extus albidis.
SPECIES 2—TRIGONALYS LACHRYMOSA. Westw.
PLATE XXIII, FIG. 5.
Nigra, subnitida : clypeo puncto parvo flavo, thorace antice punctis duobus triangularibus, tegulis, punctisque
quatuor transversis, in medio dorsi thoracis, per paria dispositis flavescentibus ; capite fere lievi, mesonoto
transverse striolato, metanoto granulato ; abdomine pnnctato, griseo-setoso, marginibus posticis segmentorum
griseis ; pedibus nigris, femoribus antieis tibiisque quatuor posticis linea flava externe notatis ; alis cinereohyalinis,
stigmate venisque nigris, nubila snbapicali anticarum fuscescente.
Long. corp. lin. 6 ; expans. alar, antic, lin. 12.
H a b i t a t ; in partibus orienfalibus Insul a Philippinensis, Mindanao (Semper). In Coll. Semper, Altoiia;.
SPECIES 3—TRIGONALYS ORNATA.
(Smith, Journal of Entomology, vol. i. p. 83.)
PLATE XXIII, FIG. 7.
' T . nigro-fusca : capite thoraceque maculis flavis ornatis : abdomine flavo fasciato; alis hyalinis; pedibus
flavis. Long. corp. o j 1.
' Head large, wider than thorax, margins rounded, somewhat flattened in front ; clypeus transverse ; anterior
margin slightly rounded and emarginate in the middle ; head, mandibles, and four middle joints of
antenna; sulphur I'ellow; mandibles with three black teeth; a minut e black or rather fuscous spot between the
antenna;; a circular broad ring above them, extending to the first ocellus, and uniting with a subtriangular
spot enclosing the posterior ocelli, on each side of which is another curved fuscous stripe, which becomes narrower
and unites at the margi n of the vertex ; thorax and legs yellow; the former has three broad longitudinal
stripes on the mesothorax, another on the scutellum and metathorax in the middle, and also a small triangular
spot on each side of the scutellum, dark, fuscous ; wings hyaline, with a slight fuscous stain along the anterior
m a r g i n of the superior pair; abdomen fuscous, darkest towards the apex, with a yellow fascia on the posterior
m a r g i n of all the segments.' (Smith, 1. c.)
Long. corp. lin. 5 i ; expaus. alar, antic, lin. 12.
H a b i t a t ; Mexico. In Mus. F. Smith.
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