b PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 7T 



DIDINEIS NODOSA Fox 



Didineis nodosa Fox, Eut. News, vol. 5, 1894, p. 127. 



Originally described from Washington State. We have four 

 males from Oregon, one from Dallas, one from Corvallis, and two 

 without definite locality; also two males from California (C. F. 

 Baker). 



One Oregon specimen lacks the yellow mark on the prothoracic 

 tubercles. 



DIDINEIS NODOSA var. CLYPEATA, new variety 



Male. — ^Length, 7 mm. Differs from nodosa Fox in having the 

 clypeus entirely yellow instead of with the upper half or more black. 

 The enclosure of the propodeum is also much more closely and finely 

 rugose. The mesepisternum is more shining and more distinctly 

 striato-punctate. In the structure of the fore legs there is no dif- 

 ference from that of 7iodosa, the coxae being flattened in front, and 

 the femora scooped out on anterior side and very much produced 

 downward at middle. 



Type locality. — Colorado (C. F. Baker). 



Type.— Cat. No. 29370, U.S.N.M. 



DIDINEIS VIERECKI Rohwer 



Didineis vierecki Rohwee, Proc. Ent. Soc. Washington, vol. 13, 1911, (l),p. 4. 



The original description of this species is far from complete in 

 so far as the characters we use in the present paper are concerned, 

 but Dr. H. B. Hungerford has kindly supplied us with information 

 as to the structure of the forelegs of the type specimen in the collec- 

 tion of Kansas University which permits us to place it in our key to 

 the species. 



It was originally described from Kansas as crassicornis by Viereck, 

 but the name was preoccupied and the above change proposed as 

 indicated. 



We have not seen the species. 



DIDINEIS DILATA. new species 



Male. — Similar in general coloration and structure to latiinana., 

 but the scape of antennae entirely fulvous yellow, legs of that color 

 but the femora blackened at bases and apices, the fore pair narrowly 

 so and with irregular marks on anterior side, fore tibiae glossy black 

 except at extreme apices, mid and hind tibiae and tarsi brownish 

 black, some portions irregularly paler. 



Structurally this species is very similar to latimana., but the con- 

 cave underside of the much wider fore tibia (fig. 7), and slightly 



