CLARENCE E. MICKEL 415 



reddish, abdomen entirely bright red. Body tliinly clothed with short, silvery 

 pubescence, most promineiit on the front; the abdomen not silvery fasciate. 

 <^ . Unknown. 



Type, a female taken at (3inaha, Nebraska, September 8, 1913, 

 (L. T. Williams). 



Related to tarsatus, but distinct from that species in the different 

 relative lengths of the antennal joints, different sculpture of the 

 propodeum and the larger size. 



Tachysphex zimmeri sp. nov. 



9. Length 11 to 12 mm. Rather stout. Anterior margin of clypeus 

 rounded, with a strong lateral tooth; apical half of clypeus polished, shining, 

 with a few scattered punctures; basal half of clypeus with close, fine punctures; 

 antennae normal not thickened medially; joint two less than half as long as 

 joint three, which is about three-fourths as long as joint four; interocular space 

 at the vertex about equal to the combined length of antennal joints two and 

 three; front finely and densely punctured, appearing granulate; punctures 

 of interocellar space somewhat finer and separated, vertex with the punctures 

 separated as much as their o^ni diameter; mesoscutum closely and finely 

 punctured, the mesoscutellum with fine, well separated punctures; the epi- 

 sterna granulate; disc of propodeum granulate; sides of propodeum finely 

 striate; posterior face of propodeum coarsely striate; the fovea moderately 

 large and smooth; disc of propodeum separated from the posterior face by a 

 strong carina; legs strongly spinose; longer spur of hind tibiae shorter than the 

 basitarsus; wings large, subhyaline; the marginal cell broadly and obliquely 

 truncate, the second and third submarginal cells about equal in length on the 

 radial vein; abdomen moderately stout; the pygidial area more than twice as 

 long as its width at the base, fairly well defined, finely reticulate, with sparse 

 shallow punctures. Black; tarsi reddish, abdomen entirely red. Body 

 thinly clothed with short, silvery pubescence, the abdomen silvery fasciate. 



cf . UnknowTi. 



Type, a female collected at Monroe Canyon, Sioux County, 

 Nebraska, August 20, 1908, (J. T. Zimmer). 



Belongs to the tarsatus group, but is distinguished by the differ- 

 ent clypeus, different puncturation, and different pygidial area. 

 Named for Mr. J. T. Zimmer, who collected the specimen. 



Tachysphex erythraeus sp. nov. 



9 . Length S to 9 mm. Modcn-atelj' stout. Clypeus slighth' rounded or 

 subtruncate, very narrowly margined anteriorly (much less margined than in 

 tarsatus or setnirufus); not emarginate medially and without lateral teeth; 

 apical half of clypeus polished, with a few large scattered punctures; basal half 

 of clypeus with small, separated punctures; antennae normal, not thickened 

 medially; joint two about one-third the length of joint three, which is slightly 

 shorter than joint four; interocular space at vertex equal to the combined 



TRANS. AM. ENT. SOC, XLH. 

 2 



