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12-1 O R D E R — H Y S I E N O P T E R A .
SPECIES 4—TEIGONALYS JUCUXDA.
("Westw. Trans. Eni. Soc. Louci, 1868, part iv. December, p. 327.)
PLATE XXIII, FIB. 8.
Rufo-fuseo et flavo varia, minute punetatissima : alis liyalinis, antiearum dimidio eostali fusco ; pedibus
rufis, tibiis basi albidis ; antenuis fuseis, basi fulvis.
Long-, eorp. Un. 4 | ; espans. alar, antio. lin. IO.
H a b i t a t ; Amazonia (Bates). In JIus. Hopeiano OxonÌEe.
Caput tlavum, vertice late castaneo, nigro eineto ; aiitennie longie, 24-artieulat£e, apice gracillimai, articulis
8 basalibus falvo-rufis, apice fuscai ; tboras castaneo-rufus ; collaris lateribus, niaculis duabus antieis mesonoti,
alteris duabus ad basin seutelli, post-seutello, et maculis duabus ad apiocm metanoti, llavis ; scutello nigricante ;
abdomen ad basin eastaueum, ad apieem nigricans, segmentorum margine apicali flavo, segnientis ventralibus
in medio inermibus.
SPECIES 5—TEIGONALTS THÌ\AITESII.
(\Vestw. Trans. Ent. Soc. Lond. 1868, part iv. December, p. 327, nec Tr. pulchellus Cresson, No. 14 infra.)
PLATE XXIII, FIG. 9.
M i n u t a ; castanea, flavo et nigro variegata : alis Hmpidis, nubila fuscescente subapicaK ; antennis obscure
fulvis.
Long. corp. lin. 3J ; expans. alar. lin. 6j.
H a b i t a t ; Insula Cejion (Thwaites). In Mus. Hopeiano Osonias (olim nostr.)
: Trigonaìys 'pulchelìa.
Species perelegans ; caput castaneum, clypeo, orbitu oculorum, macuHs tribus vertiealibus lineolisque nonnuUis
posticis flavis ; thorax eastaneus ; marginibus superis collaris, maculis duabus conicis antiois mesonoti,
alteris duabus ad latera seutelli, post-scutelli linea tenui transversa, maculisque duabus magni s posticis metanoti,
llavis ; abdomen seg-mentis dorsalibus basi nigris, apice eastaneis, primo et secondo macula magna communi
ovata, bujus etiam margine lato postico, flavis ; segmentis apicalibus fla^ds, linea longitudinali media castanea ;
segmentis ventralibus inermibus.
SPECIES 6—TEIGONALTS MAEGINATA. (Smith JIS.)
PLATE XXIII, Fio. 10.
Nigra, metanoto piceo, punetatissima : thorace punctis majoribus et magis rugoso, uecnon pauUo nitido ;
capite depresso subnitido, visi punctato, abdomine opaco subtflissime granulato ; antennis nigris ; tibiis et tarsis
magis 2iieeis ; alis liyalinis, omnium margine costali nigricauti, colore nigro cellulam marginalem et celliilam
p r i m am submarginalem occupante ; petiolo abdominis subtrigono, supra canalieulato.
Long. corp. lin. 5 ; expans. alar, antic, lin. 9| .
H a b i t a t ; Venezuela. In i lus. Britann.
The broad dark fore margi n of the -nings and the sulcated peduncle of the abdomen distinguish this species.
The first large submarginai cell receives the first recurrent vein nearly at its extremity ; the second submarginai
cell is transversely tiigonate, the second recurrent vein being continuous with the vein between the second
and third submarginai cells. There is a deep transverse notch in the middle of the ventral surface of the
abdomen.
FAMI L T—E V ANI IDyE. 125
SPECIES 7—TEIGONALTS PICTIFEONS.
(Smith, Journ. Proc. Linn. Soc. Suppl. to vol. iv. i860, p. 57.)
PLATE XXIII, Fia. 6.
' Ni t idus niger, distiucte punctatus : capite pedibusquc albo maculatis; alis hyalinis apice fuscis.
' Male, length 3 J lines, closely resembles the female, but rather more finely punctured ; the extreme base
of the femora and apex of the trochanters are pale; there is also a pale spot on each side of the scutellum and
of the postscutellum; the second segment of the abdomen has an ovate spot on each side at its apical margin,
and the third segment a very minute one beneath; the apical margin of the second segment is produced into
a stout obtuse flattened spine, directed backwards and meeting a porreeted point on the following segment.
' Female, length 5 lines; black, head and thorax with coarse shallow confluent punctures; the mesothorax
with two oblicpie longitudinal impressed hnes, which enclose, in the middle, one-third of the disc, the lateral
portions being irregularly striated longitudinally; the scutellum with a central depression; the metathorax
rounded; the face with an ovate cream-white spot outside the insertion of each of the antenna;, two at
t h e base of the clypous, and an oblong one at the inner margin of the mandibles; the head a little wider than
t h e thorax; the tubercles, the anterior tibis in front, and the intermediate and posterior pairs at their base,
w h i t e ; wings hyahne, iridescent, with a dark fuscous cloud at the apex, commencing at the stigma; abdomen
shining, more finely pimctured than the head and thorax; the base with a central longitudinal depression ;
beneath more delicately and not cpute so closely punctured.'
H a b i t a t ; Makassar (Wallace), in Mus. W. W. Saunders; Celebes (Wallace), in jMus. Britann. sub nomine
Tr. hiotima inscripta.
The other species of the curious Genus Trigonalys are :—
SPECIES 8—TEIGONALTS IIELANOLEUCA.
(Westw. Proc. Zool. Soc. April 14, 1835, No. 28, p. 53 ; Trans. Eut. Soc. 1st Ser. hi. 273 ; Gmlms ServiUd,
St. Fargean, Gu&'in. Eev. Zool. 1842, p. 84; "Westw. Trans. Ent. Soc. iii. p. 273.)
H a b i t a t ; Bahia, Brazil.
SPECIES 9—TEIGONALTS DEPEESSA.
(De Geer, JKmoires, iii. pi. XXX, fig. 7 ; Westw. Trans. Ent. Soc. 2nd Ser. vol. i. p. 231.)
I have examined De Geer's ti'pical specimen of this species in the Royal Museum of Stockholm. It is
identical with a specimen in PaykuU's Collection in the Stockholm Museum which bears the MS. name of
Sj]/iex(?] nigrita.
H a b i t a t ; Brazil, Surinam, Cayenne.
SYX. ; Trigonalys ohscura. Westw. olim Trans. Ent. Soc. vol. iii. p. 273.
Tngonalys hijmstulaia. Smith, Ann. Nat. Hist. 2ud Ser. vii. p. 28.
Triyonalys compressa. Smith, Trans. Ent. Soc. 2nd Ser. i. p. 178, pi. SVI , fig. 2.
Seminota Leprimrii. Spinola, Guirin. Mag. de Zool. Ins. 1B40, pi. XLI.
We are indebted to Mr. Smith for a note on the habits of this species. In a nest of l^olisies Lanio Fabr.,
f r om St. Salvador, in the British LIuseum, he found a specimen of the Trigonalys with its head protruding out
of one of the cells. The parasite w-as not enveloped in any pellicle, nor had the cell been closed in any way;
t h e wings were crumpled up at the sides of the body, as is usual iu Hymenopterous insects which have not
expanded them, proving very satisfactorily that it had never quitted the cell, and that Trigonalys is the parasite
of Polistes. ' The discovery,' Mr. Smith adds, ' is one of much interest, p r o™g the relationship of the insect
to be amongst the Pupivora, to which family it had been previously assigned by Mr. Westwood.' (Proc.
E n t . Soc. April 7, 1851 ; and White, Appendix to Voyage of Rat t lesnake, p. 389.)