THE THYNNIDEOUS INSECTS OF AUSTRALIA. 13T 
par une epine aigue efc un peu arquee en haut. Ailes jaunes trans- 
parentes a base, et nervures brunes. Antennes, pattes et dessous 
du corps noirs, avec un faible duvet gris-jaunatre. Long. 26 mill. 
[13 lin.] Hab. la Nouvelle Hollande.”^ 
Female. —(PI. 83, fig. 5.) The specimen of this sex sent by Mr. 
MacLeay in company with the male, is seven lines long, and of a 
chesnut colour. The head is convex and punctured, slightly broader 
than the prothorax; the antennie chesnut-brown, the clypeus 
truncate in front, the labrura short and strongly ciliated (fig. 5 a), 
the mandibles are large, sickle-shaped, and entire, chesnut coloured, 
with the tips black and furnished with long hairs on the outer 
margin of the under side ; the maxillm (fig. 5 b) are small and the 
maxillary palpi almost rudimental, the mentum also small and 
furnished with minute 3-jointed palpi (fig. 5 c). The prothorax 
is almost flat above, and nearly transversely quadrate, with a row' of 
strong punctures along its fore margin; the meso and metathorax 
are more punctured, the latter with the sides obtusely angulated, 
and its hind part not so suddenly and transversely deflexed as in 
the preceding species; the femora are black, the tibim (especially 
the fore pair) more pitchy, and the tarsi pitchy and very setose; in 
their structure they agree with the preceding species. The abdo¬ 
men is large, oval, and convex, the basal segment rugose, with a 
carinated transverse stria near the apical margin; the following 
segment is large, with seven or eight carinated transverse strise 
across it, the posterior ones being wider apart; the third segment 
is irregularly punctured, as is also the 4th on its posterior margin, 
where it is fuimished with irregular gray hairs; the fifth segment is 
deeply emarginate for the reception of the anal segment, which is 
contracted at its base and dilated into a flattened truncated 
terminal plate, with a minute tooth on each side above and a waved 
slit below% whence the exserted aculcus and its appendages are 
emitted; the sides of the preceding segment are furnished with 
long golden-coloured setm; the entire body is black beneath, the 
abdomen entire, and punctate, and the fifth segment irregularly but 
transversely rugose. 
• The following are tlie characters of a species iu my collection closely allied to T. 
Shuckardi:— 
Thynnus Guerihii, IVeslw . Niger, capite et pro- et mesotlioracc aurotomentosis, 
metathoracc griseo piloso, clypco et mandibulis flavis; abdomine Ijevi nitido supra fulvo- 
brunneo basi pallidiori, subtus nigro, brunnco vario, spina apicali lanccolata, basi utrinque 
angulata apiceque aculo instructo, alis ilavidis anticis basi fuscis vcnis stigmatcque nigricantibus, 
femoribus nigris tibiis tarsisque piceo-brunneis. Long. Corp. lin. 12. Expans. alar, lin, 23. 
Habitat King George’s Sound. Mus. Wcstw. 
