198 A ujials Entomological Society of America [Vol. IX, 



Myopa seminuda n. s]). 



Face yellowish white, with short white hair, antennic and front 

 reddish, second joint of antennae much longer than the third which is 

 usually short; front with the usual brown marks; occiput with large 

 black mark behind each eye, head from in front plainly higher than 

 broad, cheeks fully eye-height; proboscis with second joint not two- 

 thirds of head height, third about equal to second. Thorax red, with 

 three broad black stripes, more or less broken, middle one with a median 

 pale line; metanotum deep black; abdomen bright red, lateral margins 

 of segments barely white pollinose behind. Legs red, tarsi yellowish. 

 Front, thorax and abdomen with extremely short, erect black hairs. 

 Wings brownish, base yellow, costal area also rather yellowish, first 

 posterior cell open or closed. 



Length, 9 mm. 



From Corvallis, Ore., June, and near base of Mary's Peak, 

 Ore., May (Lovett), Cotypes in Coll. author and Ore. Agric. 

 Coll. The extremely short hair distinguishes the species. 



Myopa virginica n. sp. 



Black, head yellowish white, face with short white hair; antennse 

 reddish, second joint much longer than the third; front with dark 

 V-mark extending back and down on the occiput, also in a V. Head 

 from in front plainly higher than broad, cheeks equal eye-height; 

 proboscis dark, last joint paler, and as long as the second, latter about 

 one-half of head height. Thorax with humeri shining, sometimes 

 faintly reddish on sides and behind; abdomen black, first and second 

 segments with lateral white pollinose spots, third fourth and fifth with 

 apical white pollinose margin, broader at the sides, sixth and seventh 

 mostly white pollinose; fourth and fifth segments with a narrow median 

 white pollinose stripe. Legs blackish or brownish, basal part of tibia 

 and most of tarsi pale. Front, thorax, abdomen and legs with rather 

 short, black hair. Wings brownish, base yellow, first posterior cell 

 closed before the margin. 



Length, 7 mm. 



From Falls Church and Glencarlyn, Va., in June and early 

 July. Also one from the Catskill Mountains, N. Y., June, and 

 one from Black Mountain, Swannanoa Valley, N. C, May. 

 Probably this is the form referred to by Williston in his remarks 

 after the description of P. vesiculosa as one specimen from 

 Virginia with black pile. 



Myopa plebeia Will. 



Described from Arizona, I have seen one from Washington 

 State (Mann.) Although structurally similar to M. virginica, it 

 is much larger, and with a very different habitus, however too 

 few specimens are known to me to know if it varies. The 

 M. castanea of Bigot is quite probably the same form. 



