NO. 1866. iY^TF SAWFLIES IN U. 8. NATIONAL MUSEUM—ROHWER. 395 



length of two following joints. Ruf o-f erruginous ; antennae, head 

 (except clypeus, labriim, and base mandibles), spots on mesoscutum 

 and mesoprescutum, mesosternum, sheath, intermediate tarsi, pos- 

 terior tibiae and tarsi black; wings black. 



Federal District of Mexico. One female from Guillarmo Gandara. 



Type.— Cat. No. 14005, U.S.N.M. 



STROMBOCEROS (EUSTROMBOCEROS) XANTHOGASTER, new species. 



Male. — Length 8 mm. May be the male of S. melanopterus but 

 differs in the following color characters: Thorax (except the prono- 

 tum) and basal plates black. Hypopygidium broadly rounded api- 

 cally, tipped with black. 



Federal District of Mexico. One male from Guillarmo Gandara. 



Type.— Cat. No. 14006, U.S.N.M. 



STROMBOCEROS (EUSTROMBOCEROS) GANDARAI, new species. 



Wings black, head black. 



Male. — Length 8.5 mm. Clypeus truncate; supraclypealfovese deep, 

 punctiform; antennal fovege shallow, not well defined; supraclypeal 

 area nearly flat; lateral fovesB punctiform, a little above the level of 

 the middle fovea; middle fovea transverse oval well defined; anten- 

 nal furrows wanting; ocellar basin large, rectangular, not sharply 

 defined above; postocellar area transverse, sharply defined laterally; 

 postocellar hne longer than the ocelloccipital but shorter than the 

 ocellocular lines; eyes strongly converging to the clypeus; antennae 

 subpilose, fiUform, the tliird and fourth joints subequal, pedicellum 

 wider than long; stigma strongly tapering; transverse radius but Httle 

 beyond the middle of cell ; third cubital cell longer than the fourth; 

 cubitus with a spurious vein near the base; transverse mecUan less 

 than its length from middle; lanceolate cell of the hind wings sessile; 

 hind basitarsis much shorter than the following joints; hypopygidium 

 short, broadly rounded apically. Black; pronotum, small lateral spots 

 of anterior part of mesoprescutum, tegulae, first perapteron, upper 

 part of mesoepimeron, posterior face of mesoscutum, dorsal abdom- 

 inal segments three to six, rosy red (perhaps due to potassium cyan- 

 ide) , four anterior tibiae and apical part of femora beneath, posterior 

 knees pale yellowish; wings black. 



Federal District of Mexico. One male from Guillermo Gandara, ento- 

 mologist of Estacion Agricola Central, for whom the species is named. 



Type.— Cat. No. 14007, U.S.N.M. 



** PEDICELLUM MUCH LONGER THAN WIDE. 

 STROMBOCEROS (EUSTROMBOCEROS) LEUCOSTOMUS, new species. 



Superficially like Stromboceros (ohm Selandria) curialis (Cresson), 

 but that species has the third joint of the antennse longer than four 

 plus five, and the hind basitarsis as long as the following joints. 



