ENTOMOLOGY OF COLORADO. 341 



This is not a species-forming family, but its types are widely spread. 

 There are only two North American genera not here represented, both 

 belonging to the Northeastern States, and mouotypic. Passalcecus 

 (also European) is a boreal genus which has not split into many spe- 

 cies; there is only one other in the United States besides the above, 

 both of which extend to British America. C. inornatus, the only 

 United States species of its genus, extends to Canada, and is widely 

 distributed. The same applies to Pemph. concolor, except that there 

 is a second species in Pennsylvania. S. frntermis goes to Canada. 

 New York. Pennsylvania, and there is a different species in Illinois. 

 There is no Colorado species of this family not found in Wet Mountain 

 Valley, so far as known. 



NYSSONIDJE. 



404. Hoplisus flavinotatus Ashm. MS.; see 10th Eep. Colo. Biol. Asso'n. 



Hoplisus is a widely distributed genus, also European. 



The genus Gorytes is not in our list, and judging from Cressou's list, the 

 species seem to come from the Southern and Eastern States. But Mr. 

 Fox has lately described five new species from Western States (Nevada, 

 Montana, Washington), showing that it will not do to theorise very 

 much on present information, which is so liable to be upset by new 

 discoveries 



BEMBECIN^E. 



405. Steniolia obliqua Say, Cusack Ranch (M. E. Cusack); West Cliff. 



This species is given only for Colorado in Cresson's list, but I learn from 

 Mr. Fox that it is found in British Columbia and Texas, and that there 

 are three other American species. 



NEOLARRIN^. 



406. Neolarra pruinosa Ashm., Hym. Colo., p. 8. 



This insect was made the type of a new species, genus and subfamily by 

 Mr. Ashmead, and is, I believe, still only known from the typical 

 specimen, which is in the collection of its describer. 



LARRID^. 

 LARRIN^. 



407. Larra montana Cr., Cusack Ranch (M. E. Cusack). 



A widely distributed genus, but the present species seems confined to 

 Colorado. There are four other Colorado species. 



SPHECID^. 



408. Ammophila vulgaris Cr. West Cliff, May 25. 



409. " robusta Cr., Swift Creek, caught preying upon a Clisiocampa 

 larva. 



410. Ammopliila macra Cr., Willow Creek, Cusack Ranch, Aug. 14. 



411. •' luctuosa Sm. West Cliff, May 23, 24 and 25. 

 Ammophila, also a European genus, is well represented in Colorado with 



nineteen species. A. vulgaris is also found in Texas, and so is prob- 

 ably a southern type; while A. luctuosa is boreal, and the other two 

 seem peculiar to Colorado. 



TRANS. AM. ENT. SOC. XX. DECEMBER, 1893. 



