210 p. CAMERON. 



postscutelliim, an oval mark ou the sides of the metanotuni at the base, a mark, 

 longer than it is wide, at the top, transverse above, rounded below, on the base of 

 the mesopleur* above, a broad line on the apex of the first abdominal segment, 

 with a large mark, oblique and narrowed towards its base, issuing from its sides, 

 an irregular oval mark near the middle of the second segment, its apex more 

 broadly and regularly than the first, the line extending below ; two large oval 

 marks on the second ventral, and a line on the middle of the fourth and fifth 

 dorsal, yellow. Legs rufo-fulvous, the eoxje and trochanters black ; the apex of 

 four anterior femora and the tibife in front yellow. Wings hyaline, tinged with 

 fuscous, highly iridescent, the stigma and nervures black. %. Length (total) 

 6 mm. 



Head strongly, deeply, but not closely punctured; the clypeus strongly but 

 more sparsely punctured ; it is not much longer than its greatest width ; its apex 

 depressed, ending in two stout teeth. Thorax strongly, closely punctured, ex- 

 cept at the base of the raetapleurse, where it is aciculated ; its base transverse, 

 with the sides angled. Apex of postscutellum broadly rounded; the sides of 

 nietanotum somewhat narrow, almost margined above, below armed with a long- 

 isb, narrow, oblique spine. Apex of first abdominal segment slightly, the apex 

 of second distinctly reflexed ; the second is clearly longer than it is wide at the 

 apex; it has there a row of longish fovese. Flagellum of antennae brownish 

 below; the hook does not extend much beyond the ba.se of the last joint. 



Fedor, Texas ; February. 



Characteristic of tliis little species are the two large ovalish marks 

 on the second ventral abdominal segment. Otherwise it looks like 

 a small example of 0. vegasensis Cam. ; that species has the body 

 more densely and distinct pruinose, the apex of postscutellum is 

 dilated in the middle, and the sides of the metanotum are broadly 

 yellow. 0. toas Cress, agrees closely in coloration. 



Ancislrocerus antlieus sp. nov. 



Black ; the clypeus, mandibles, except the teeth, a line on the lower part of the 

 eye incision, dilated above, a mark, gradually narrowed below, above the an- 

 tennae, a short line on the outer orbits, two large marks, roundly narrowed be- 

 hind; on the pronotum, postscutellum, broad lines, the first slightly dilated be- 

 fore the end, which is narrowed, on all the abdominal segments, the lines on the 

 second and third all round, an irregular mark near base of second, almost the 

 apical half of the fore femora, the apical third of the middle, the apex of poste- 

 rior narrowly and the tibise and tarsi, bright sulphur-yellow. Tegulse large, yel- 

 low, with a fuscous spot; there is an irregular yellow mark on the pleurse below 

 them. Wings hyaline, highly iridescent, the stigma dark fuscous, the nervures 

 black. % . Total length 5 mm. 



Clypeus slightly longer than wide, broadly rounded above; the apical teeth 

 triangular, the incision becomes gradually widened from the top to the bottom, 

 forming a triangle; the punctuation is strong, but not close. Front and vertex 

 strongly, closely punctured, as is also the thorax, but more strongly. Base of 

 thorax transverse, the sides not projecting. Tiiere are two short wido depres- 

 sions on the apex of mesonotum, a narrow but distinct furrow ddwn (he apical 



