ABTll. NOTES ON NEARCTIC BIBIONID FLIES — McATEE. 11 



BIBIO FUMIPENNIS Walker. 



Bibio fumipennis Walker (Francis), List of the Specimens of Dipterous In- 

 eects in tiie CoUection of the British Museum, pt. 1, 1848, p. 122 [St. 

 Martin Falls, Albanj River, Hudson Bay]. 



Male. — Head, body, and coxae black, the head with copious, long, 

 dark hair, the other parts with same, pale yellow to grayish; legs 

 rufous, the femora dark-tipped, the tibiae hardly so, except front 

 ones each of which have a brownish annulus at base of the very 

 unequal rufous spurs, last two or three tarsal joints dark, hind 

 femora and tibiae clavate, and hind tarsi somewhat enlarged ; wings 

 yellowish fumose, deeper costally where the veins and stigma are 

 brown. Length of wing, 7.5-8 mm. Female not seen. 



Two males from Mount Washington, New Hampshire, Slosson, 

 and Banff, Alberta, Sanson, identified by Coquillett may be this 

 species ; the original description does not refer to the anterior tibial 

 spurs, hence without access to the type specimen identification can 

 not be positive. 



BIBIO HOLTII, new species. 



MaU. — Spurs of front tibiae very unequal ; hind legs elongate, their 

 femora and tibiae clavate, and metatarsi slightly enlarged; eyes 

 reddish with copious, rather long black hair, occiput with long dark 

 hair; body and coxae black with rather sparse, long pale (reddish 

 to grayish) hair; femora except their extreme ends bright rufous, 

 remainder of legs dark reddish-brown to black, femora with rather 

 long, pale, and tibiae and tarsi with shorter dark hair; wings dusky 

 fumose, both veins and membrane distinctly darker on costal half of 

 wing; stigma brown. 



Length of wing, 7 mm. 



Type.— C&t. No. 24700, U.S.N.M. A male from Graham Moirn- 

 tains, Arizona, July 25, 1914, E. G. Holt (U.S.N.M.). 



A paratype male, Geneva Park, Grant, Colorado, altitude 10,000 

 feet, August 19, 1914, differs in having the femora yellow, and in 

 being smaller, the wing measuring 5.5 mm., E. C. Jackson (Biologi- 

 cal Survey). Another paratype male from Custer, South Dakota 

 (Aldrich), agrees well with the type; length of wing, 7 mm. This 

 species is named for the collector of the holotype, Mr. E. G. Holt, 

 who has collected many interesting and novel insects in the western 

 States, a particularly notable lot of which were obtained in the 

 Graham Mountains. 



BIBIO HUMERALIS Walker? 



Bibio humeralis Walker (Francis), List. Dipt. British Mus., pt. 1, 1848, 

 pp. 121-2 [Nova Scotia]. 

 Female. — Head and body black, complete transverse inverted 

 V-shaped band along suture between pronotum and mesonotum. 



