I ' 



1919] Plath: Larva of Phormia 381 



side; middle tibia with one on outer front, one on outer hind, and two 

 on inner hind side; hind tibia with two on outer front, six on outer hind, 

 three on inner hind, and a few ciHa on basal half. 



Wings uniformly blackish-brown; costal spine almost wanting; last 

 section of fourth vein one and a half times the preceding. 



Female — Color rather uniform dark gray ; front almost one-third the 

 head width; cruciate bristles present; abdomen uniform gray, sub- 

 shining; chaetotaxy as in male. Calypters yellow, with pale fringe; 

 wing not infuscated. 



Length, 4 mm. 



Locality, Seattle, Washington. 



Type, male, allotype, female, and one paratype female, 

 deposited in United States National Museum (Type No. 22131). 

 Paratype male and female deposited in the California Academy 

 of Sciences. 



The species shows the usual characters of Hylemyia — 

 sixth vein reaching wing-margin, scutellum with delicate hairs 

 below, hind calypter not elongated. The bare arista would 

 place it in Phorbia according to the prevailing system; but I 

 agree with Malloch (in Trans. Amer. Ent. Soc, xliv, 305, 1918) 

 that plumosity of the arista is not a generic character in this 

 case and Phorbia cannot be maintained. 



