COLLECTED IN BOttNEO, ETC. 121 



of which is a triangular shallow cavity which has several radiating 

 carinae ; the corners of the triangle raised and recurved ; the antennae 

 and palpi hlack. Thorax coarsely rugose, having a mixture of trans- 

 verse sculpturing and large shallow punctures ; wings fusco-hyaline, 

 with the nervures black, a slight fuscous cloud in the first discoidal 

 cell ; the posterior margin of the prothorax narrowly pale testaceous ; 

 the posterior coxae transversely rugose-striate ; the posterior femora 

 incrassate, denticulate beneath. Abdomen : the first segment trans- 

 versehy striated, the following smooth and shining ; the ovipositor a 

 little shorter than the body. 



Male. About the same size as the female, similarly coloured and sculp- 

 tured ; the posterior femora similarly denticulate ; the first segment of 

 the abdomen more finely striated, the apical margins of the third and 

 three following segments notched in the middle. 



Hub. Sarawak. 



Gen. Macrogaster, Brulle. 



1. Macrogasteb flavo-pictus. M. nigro flavoque varius, alis 

 anticis macula magna nigro-fusca ad apicem. 



Female. Length 15 lines. Head black; the face, cheeks, mandibles, 

 and scape in front, yellow. Thorax black, transversely rugose ; the 

 posterior margin of the prothorax, a small and a large spot beneath 

 the wings, the legs and breast in front, four spots on the meso- 

 thorax, a spot on the scutellum and a smaller one at each side, the 

 tegulae, and the base and sides of the metathorax, yellow ; the wings 

 hyaline ; the nervures black ; the stigma yellow ; a large dark fuscous 

 macula at the apex of the marginal cell extending across the second 

 submarginal cell. Abdomen black and subopake, with the apical 

 margins of the segments smooth and shining ; each segment with a 

 yellow fascia before its apical margin, the two basal fasciae widest in 

 the middle, the four following narrowest in the middle, or the two 

 last slightly interrupted ; the ovipositor twice the length of the insect. 



Hob. Singapore. 



This species may possibly be a Rhyssa with the petiolated submarginal 

 cell obsolete ; the neuration of the wing agrees with that of Brulle's 

 genus Macrogaster. I am not acquainted with any other genus to 

 which it could belong ; the antennae are those of Rhyssa, not appa- 

 rently of Macrogaster. 



Gen. Ophion, Fair. 



1. Ophion iridipennis. O. rufo-ferrugineus, capite postico flavo, 

 abdomine fusco basi ferrugineo, metathorace rugoso. 



Female. Length 10 lines. Reddish-yellow; the eyes distinctly emar- 

 ginate ; the face smooth and shining, slightly convex ; the tips of the 

 mandibles black ; the head yellow behind. Thorax : the mesothorax 

 smooth and shining, with a central longitudinal fuscous stripe ; the 

 metathorax coarsely transversely rugose, with a series of short longi- 



LTNN. PEOC. — ZOOLOGY. 9 



