48 PROCEEDINGS OF THE NATIONAL MUSEUM vol.75 



8. Maculations on tergites 1-5 broken into lateral and a pair of white discal 



spots elegans. 



Maculations on tergites 1-5 not as above 9. 



9. I'iagellar segments -H bearing small, narrow pits duplicata. 



Flagellar segments 4-7 not bearing pits dissimilis. 



30. Femora, particularly the third pair, black and ferruginous 11. 



femora not black and ferruginous albicantia. 



11. Abdominal markings yellow; spine on second sternite well developea. 



longirostris. 



Abdominal markings white; spine on second sternite lacking or weakly 



developed guatamalensis. 



12. Middle tibia dilated 13. 



Middle tibia not dilated 14. 



13. Abdominal maculations white obliqua. 



Abdominal maculations yellow tibialis. 



14. Femora, particularly the third pair, black and ferruginous 15. 



Femora not black and ferruginous duplicata.* 



15. Maculations on tergites rich yellow ; apical border of tergites rufous. 



longirostris. 



Maculations on tergites white or yellowish white; apical border of tergites 



black , guatamalensis. 



STENIOLIA OBLIQUA Cresson 



Steniolia obliqua Cresson, Proc. Ent. Sec. Phila., vol. 4, 1SG5, p. 469. — Hand- 

 LiRSCH, Sitz. Akad. Wissensch. Wien, Math.-Nat. CI., vol. 98, 1889, p. 511.— 

 D^viXA Torre, Cat. Hym., vol. 8, p. 501. — Pabker, Proc. U. S. Nat. Mus., 

 vol. 52, 1917, p. 12. 



This species is characterized by its swollen or inflated middle tibia, 

 more evident on the male than on the female, and by its white 

 maculations and white pubescence. 



SPECIMENS EXAMINED 



Colorado: Boulder (September 8. 1908, S. A. Rohwer) ; Florissam, (June 29, 



July 1, S. A. Rohwer) ; Silver Plume (July 10, 1897). 

 Utah: Ogden (L. Brunner). 

 Wyoming : Carbon County. 



This species has been found also in Oregon. 



STENIOLIA TIBIALIS Handlirach 



Steniolia tibialis Handlirsch, Sitz. Akad. Wissensch. Wien, Math.-Nat. CI., 

 vol. 98, 1889, p. 513.— Dalla Torre, Cat. Hym., vol. 8, 1897, p. 501.— Parker, 

 Proc. U. S. Nat. Mus., vol. 52, 1917, p. 14. 



This species like ohliqua is characterized by a swollen or inflated 

 middle tibia, but with this species the maculations are bright yellow 

 instead of white. In the collection of the California Academy of 

 Sciences there is an interesting form concerning which Mr. C. L, 



* Here belongs also the female of diasimilts, on which I failed to find characters on 

 which I could rely with certainty to separate it from duplicata. 



