NO. 1866. NEW SAWFLIE8 IN V. 8. NATIONAL MUSEUM— ROHWER. 393 



Cordoba, Mexico. One female collected June 14, 1905, by F. Knab. 

 Type.—Csit. No. 14001, U.S.N.M. 



STROMBOCEROS (STROMBOCERIDEA) PLESIUS, new species. 



Related to Stromhoceros maculipennis (Cameron), which belongs 

 to the same group, but the mesoprescutum is margined with a cream 

 colored band, and the antennae are not as strongly spinose beneath. 



Female. — Length 10 mm. Clypeus truncate, lateral angles 

 rounded; supraclypeal fovese very small, punctiform; antennal 

 fovese wanting as are also the antennal furrows ; middle fovea hardly 

 defined, large and shallow; lateral foveae small, punctiform; ocellar 

 basin wanting; postocellar line much shorter than the ocelloccipital 

 or ocellocular line; postocellar area transverse, well defined laterally; 

 eyes nearly parallel; antennae pilose, long tapering, third joint but 

 very little longer than fourth, pedicellum much longer than broad; 

 stigma nearly parallel sided, sharply, obliquely truncate; venation as 

 maculipennis; lanceolate cell of hind wings sessile; hind basitarsis 

 subequal with the following joints; claws cleft; sheath narrow 

 obtusely rounded. Creamish-yello w ; flagellum, head above middle 

 of eyes, middle of mesoprescutum, mesoscutum, scutellum, meso- 

 sternum, mesoepimeron, apical three abdominal segments, apical 

 four joints of intermediate tarsi, apex of posterior tibiae and their 

 tarsi hlacli. Wings black with a broad yellow band in the middle, 

 venation the color of wings. 



Santa Rosa, Mexico. One female collected by William Schaus. 



Type.— Cut. No. 14002, U.S.N.M. 



STROMBOCEROS (STROMBOCERIDEA) URICHI, new species. 



ifaZe.— Length 7.5 mm. Clypeus broadly rounded; supraclypeal 

 area flat; supraclypeal foveae small punctiform; antennal foveae very 

 shallow, poorly defined; antennal furrow nearly complete, but not 

 sharply defined; middle and lateral foveae punctiform, the latter 

 above the former and much better defined; ocellar basin small, just 

 around the ocellus; postocellar furrow wanting; postocellar line sub- 

 equal with the ocelloccipital line, much shorter than the ocellocular 

 line; postocellar area transverse; pedicellum much longer than 

 broad, rest of the antennae wanting; stigma rounded below, truncate 

 apically; transverse radius in apical third; third and second cubital 

 cells subequal; transverse median somewhat beyond the middle; 

 lanceolate cell of the hind wings sessile; hind basitarsis subequal with 

 the following joints; claws with an erect inner tooth; hypopygidium 

 narrow, broadly rounded apically. Pale yellowish; pedicellum, pos- 

 terior orbits and head above the middle of the eyes, mesoscutum, 

 intermediate tarsi, most of the posterior tibiae, their tarsi black ; apex 

 of the abdomen brownish; wings hyaline, slightly brownish apically; 

 venation pale brown; stigma yellowish. 



