26 MR. F. SMITH ON HTMENOPTEEOUS INSECTS 



Male. Length 9 lines. Black, closely and finely punctured ; the cly- 

 peus with its anterior margin truncate ; longitudinally and irregularly 

 striated, the striae interspersed with strong punctures; the orbits 

 of the eyes narrowly bordered with yellow, the border interrupted 

 above. The disk of the thorax more strongly punctured than the 

 other portion ; the anterior margin of the prothorax fringed with dark 

 pubescence ; the wings dark fuscous, palest at their apical margins. 

 Abdomen shining, more delicately and more distantly punctured than 

 the head and thorax ; the apical segment longitudinally striated above ; 

 the sixth segment has a short acute spine on each side beneath ; the 

 seventh is terminated by a tridentate mucro, and has also on each side 

 a small, flattened, projecting process; the abdomen is much more 

 strongly punctured beneath than above. 



Hab. Ceram. 



2. Thynnus iNSULARis. T. fcrrugincus, capite thoruccque rude punc- 

 tatis. 



Female. Length 3 lines. Ferruginous; the head quadrate, strongly 

 punctured, more or less fuscous, the eyes situated at the anterior 

 angles ; the antennae and mandibles pale ferruginous. Thorax coarsely 

 punctured, the metathorax obhquely rounded ; the legs spinose. Ab- 

 domen oblong, strongly punctured, the segments darkest at the base ; 

 the body thinly sprinkled with pale, erect pubescence. 



Hab. Mysol. 



3. Thynnus placidus. T. niger, nitidus, punctulatus; abdomine 

 laevi, dehcatule et sparse punctulato ; ahs anticis fusco-nigris, pur- 

 pureo-iridescentibus, posticis subhyaliuis. 



Male. Length 8^ lines. Black and shining ; the head and thorax finely 

 and closely punctured, the abdomen delicately and distantly so. The 

 anterior margin of the clypeus truncate ; the outer orbits of the eyes 

 narrowly bordered with yellow ; there is also an abbreviated line on 

 their inner orbits. The wings with a slight purple iridescence ; the 

 anterior pair dark fuscous, with their apical margins paler ; the pos- 

 terior pair subhyaline. Abdomen shining black, with a fine chalybeous 

 iridescence, delicately and not very closely punctured, beneath strongly 

 punctured. 



Hab. Waigiou. 



■o 



4. Thynnus pullatus. T. niger, nitidus, capite thoraceque punc- 

 tatis, alis fusco-hyalinis. {Mas.) — T. niger, thorace antice coarcte punc- 

 tato, abdomine utrinque maculis tribus flavis. {Fcsm.) 



Mule. Length 9 lines. Black, the head and thorax closely punctured, 

 slio-htly shining ; a narrow abbreviated line on the inner orbits of the 

 eyes and a similar line behind them yellow ; a minute yellow spot at 

 the base of the mandibles ; the pubescence on the head, on the sides 

 of the thorax and beneath, cinereous ; the wings subhyaline, tinged 



