ENTOMOLOGICAL SECTION. XXI 



Coxae more or less yellow; second segment of abdomen above always 

 with pale band or spots. 

 Third submarginal cell narrowed at least one-half towards the 

 marginal. 

 Form subrobust; transverse ridge between base of antenna; 



white 12. nevadica n. sp. % (Nev.) i'' 



Form long and slender ; transverse ridge between base of antennpe 



black 13. angustata n. sp. % (Gala.) 



Third submarginal cell not narrowed one-half towards the mar- 

 ginal. 

 First abdominal segment entirely black. 

 Second submarginal cell much longer than broad, apex of the 

 third truncate; the pale bands on abdomen uninterrupted; 

 prothorax with a yellow band on anterior margin, inter- 

 rupted medially and somewhat recurved. 



14. trtiiicata n. sp. % (Ncv.) 



Second submarginal cell subquadrate, being but slightly longer 



than broad, apex of third rounded: pale bands on abdomen 



interrupted or subinterrupted ; prothorax with a white line 



on lateral anterior margin 15.obscura n. sp. % (Xev.) 



First abdominal segment with two pale spots above; second 

 submarginal cell quadrate or nearly so, apex of the third 

 rounded; form long and narrow ; the pale bands on abdomen 



uninterrupted 16. fulvicoi'iiis n. sp. % (Nev.) ^ 



Metathorax with two yellow spots. 

 Inner yellow orbital line not reaching summit of eyes; clypeus with 

 transverse yellow spot at base. 



17. ainericana n. sp. 9 {^- Y.) 

 Inner yellow orbital line extending beyond summit of eyes to a 

 point opposite the i)Osterior ocelli ; clypeus with lateral and 

 basal margins yellow. 

 Venter with interrupted yellow bands, the second segment black, 

 sometimes with a narrow interrupted band at lip; jTOsterior 

 yellow orbital line narrow, interrupted. 



18. centrala Say, 9 (N. Y., Del., Va.) ^ 

 Venter with very broad yellow bands, the second segment almost 

 entirely yellow; posterior yellow orbital line broad and 



entire 1*J- niontana n. sp. 9 (Nev.) -^ 



Space between eyes and base of mandibles broad. 



Scutellum, metathorax and pleura with lateral yellow sjiot; posterior 

 coxse and femora yellow beneath. 



20. clegailS n. sp. % 9 (^"ev.) ' 

 Scutellum, metathorax, pleura and posterior coxse entirely, and their 

 femora except tips black. ..21. coloradensBS n. sp. 'J, (Col.) 

 Mr. Cresson stated that detailed descriptiuus of the uew species, 

 briefly characterized above, would be published shortly. 



The following additions to the Library of the American Entomo- 

 logical Society were announced : — 



American Entomologist, vol. iii, Nos. lU and 11. By purchase. 



MONTHLY PROC. ENT. SEC. A. N. S. (4) DECEMBER, 1880. 



