NO. 2202. GIFFARD COLLECTION OF UYMENOPTERA—ROHWER. 245 



nent; the first two abcissae of radius subequal, the third a trifle 

 shorter; abdomen shining, without apparent sculpture; pygidium 

 one and one-third times as long as basal (base of lateral carinac) 

 width. Black, abdomen clear red; head and thorax with a small 

 amount of silvery pile; wings dusky hyaline. 



Tyjye-locality. — Summit, Placer County, California. Described 

 from six females collected in July, 1907, by W. M. Giffard, for whom 

 the species is named. 



Type.— Cat. No. 19927, U.S.N.M. 



Two paratypes in Mr. Giffard's collection. 



TACHYSPHEX ELDORADENSIS, new species. 



In Fox's table this will go to consimilis Fox, but it is larger and 

 the abdomen is all red. It is closely allied to giffardi Rohwer, but 

 is larger and the mcsoscutum is much more coarsely sculptured. 

 Eldoradensis is most closely allied to neomexicanus Rohwer, but 

 may be separated by the much longer pydidium. 



Female. — Length 11 mm. Clypeus strongly convex, shining with 

 large separate punctures, the anterior margin subtruncate (slightly 

 wavey) the lateral angles not at all produced; frons coarsely coriace- 

 ous; intraocellar area with separate distinct punctures, the vertex 

 similarly but more closely punctured; superior interocular line about 

 half as long as the inferior, distinctly longer than the second and 

 third antennal joints but markedly less than the third and fourth; 

 antennae slightly tapering, the third joint one-fifth shorter than the 

 fourth; mesoscutum punctured similar to vertex; scutellum shining 

 more sparsely punctured, not impressed ; dorsal aspect of propodeum 

 coriaceous, the sides finely striato-granular, the posterior face dis- 

 tinctly transversely striate; the first and third abcissa of radius 

 subequal, the second much shorter; abdomen shining, without ap- 

 parent sculpture, the pj'^gidium three times as long as basal (base of 

 lateral carinae) width. Black; abdomen clear red; tarsi reddish; 

 pubescence silvery; wings dusky hyaline. 



Type-locality. — Tahoe, Eldorado County, California. One female 

 collected at an altitude of 6,200 feet, June, 1909, by W. M. Giffard. 



Type.— C^ii. No. 19928, U.S.N.M. 



TACHYSPHEX PLESLA., new species. 



In Fox's synopsis this will fall in with fumipennis, but, judging 

 from the description, it is not closely allied to that species. 



Female. — Length 8 mm. Clypeus convex, shining, with distinct 

 separate punctures ; the anterior margin with a broad, low, depressed 

 lobe which is gently rounded; frons coarsely punctato- reticulate ; 

 intraocellar area with separated punctures; vertex with scattered 



