No. 3.] HYGROCELEUTHUS AND DOLICHOPUS. 



147 



white dusted. Fore coxae yellow with white pubescence in front, at apex 

 and inwardly with black hairs. Middle and hind coxae of same color as 

 the pleurae, yellow only at extreme tip. The middle pair with white hairs 

 in front. Legs yellow. Fore tarsi ornamented ; the first two joints long 

 and slender, first about once and a half the length of the second ; third 

 less than one-half the length of the first, much enlarged at apex, where it is 

 infuscated ; fourth joint small, shorter than the third, flattened, velvety 

 black ; fifth oval, about one-half as long as the first, broadly compressed, 

 deep black and fringed on anterior edge with black hairs ; empodia silvery 

 white. Middle tarsi infuscated from tip of first joint. Hind femora not 

 ciliated ; hind tibiae wholly yellow with a dorsal, apical, glabrous stripe ; 

 hind tarsi wholly black. Tegulae and halteres yellow ; tegular cilia black. 

 Wings narrow, nearly hyaline, slightly brownish in front ; costa with no notice- 

 able swelling ; fourth vein not broken ; distinctly lobed at tip of sixth vein. 

 Fcfnale. Length 5.5-6.5 mm., of wing 6.25-6.75 mm. Face yellowish- 

 gray. Front tarsi plain, infuscated from tip of first joint, the second and 

 third joints lighter at base, giving the tarsus a somewhat banded appear- 

 ance. Wings darker and longer than in the male ; only a faint indication 

 of the preanal lobe. 



Two males and three females from Price County, Wis. ; 

 collected by Dr. Wm. M. Wheeler. 



This species resembles coloradensis Aldrich, from which it 

 differs by the larger size, bright yellow face, lighter antennae, 

 brownish wings, and white hair on front face of anterior coxae. 



Together with flagellitenens Wheeler, amphcricus possesses 

 greatly enlarged metapleurae which give a winged appearance 

 to the first abdominal segment. The posterior portion of the 

 metapleurae is dull black and pubescent. 



The following localities are those of species in the collection 

 of Dr. Wm. M. Wheeler : 



Group Hygroceleuthtis. 



latipes Lw. Wisconsin, Illinois, 

 van cognatiis, Illinois, Massa- 

 chusetts. 



Aldrichii Wheeler. Idaho, Wyo- 

 ming, Colorado. 



pluniipes Scop. Colorado. Van- 

 couver. 



Wheelerii M. et B. Massachusetts. 



amnicola M. et B. Colorado. 



crenatus O. S. Vancouver, Cali- 



fornia, Washington, Wyoming, 

 Idaho. 

 consanguinetis Wheeler. California, 

 var. propinqmis. Vancouver 

 Island. 



Arizona, California, 



afflict us O. S. 



Washington. 

 cilia tus Aid. 



Dakota. 

 idahoensis Aid 



Wvoming, South 

 Idaho. 



