12 COQiJILLETT [39$] 



Dicranomyia halterata Osten Sacken. 



Dicranomyia halterata OSTEN SACKEN, Monographs Diptera N. Am., iv, p. 

 71, 1869. 



Muir Inlet, June 12 ; Popof Island, Alaska, July 10 and 16 : Eight 

 specimens. Originally described from Labrador, and Bergroth has 

 already reported it from Alaska. 



Dicranomyia infuscata Doane. 



Dicranomyia infuscata DOANE, Journal N. Y. Ent. Soc., Sept., p. 185, 1900. 



Yakutat, Alaska: A male specimen, collected June 21. Originally 

 described from Collins, Idaho. 



Limnobia sciophila Osten Sacken. 



Limnobia sciophila OSTEN SACKEN, Bulletin U. S. Geol. Geog. Survey Terr., 

 in, p. 197, 1877. 



Kadiak, July 20; Saldovia, Alaska, July 21: Three specimens. 

 Originally described from northern California, but also occurs in 

 Colorado. 



Rhypholophus affinis Lundbeck. 



Rhypholophus affinis LUNDBECK, Videnskabelige Med. Nat. For. Kjob., p. 

 266, 1898. 



Lowe Inlet, British Columbia: A male specimen, collected June 3. 

 Originally described from Greenland. 



Rhypholophus flaveolus sp. nov. 



Yellow, the upper side of occiput and posterior part of the front 

 black, gray pruinose, the antennas and palpi, except first joint of each, 

 also the legs, except the coxae, trochanters, and bases of femora, dark 

 brown ; hairs of body nearly wholly yellow ; antennae reaching slightly 

 beyond insertion of wings, tapering to the apex, the joints beyond the 

 second somewhat elliptical, scarcely longer than broad, the hairs less 

 than twice as long as greatest diameter of the joints from which they 

 spring ; wings grayish hyaline, wholly covered with hairs, veins yel- 

 low, stigma scarcely apparent, discal cell opening into the second 

 posterior, seventh vein toward its apex strongly diverging from the 

 sixth. Length 4 mm. A male specimen, collected June 27. 



Habitat. Orca, Alaska. 



Type. Cat. no. 5200, U. S. National Museum. 



Related to holotrichus, but of a much lighter color and with the 

 anal cell greatly dilated at its apex. 



