1916] Synopses of Zodion and Myopa 197 



Myopa willistoni n. n. 



M. pictipennis Will, preoccupied 'by M. pictipennis Rob.- 

 Desv. 1S30. 



This species is distinct from all our other forms, except 

 melanderi, by the much thickened femora. The second joint of 

 proboscis is fully two-thirds of the head-height, the third joint 

 is about equal to the second. The hair on the face is not as 

 long as in vicaria. The knob of the halters is dark, pale in our 

 other species. I have seen specimens from Oregon and California. 



Myopa melanderi n. sp. 



Black, face white, with short white hair, front with the usual 'black 

 V-mark, and spots at the base of the antennse, latter dark. Head 

 from in front about circular ; cheeks scarcely higher than eyes ; proboscis 

 black, last joint shorter than second, the latter hardly two-thirds of 

 head-height; second antennal joint scarcely if at all longer than the 

 third. Thorax black, two short, white pollinose stripes in front part. 

 Abdomen, black, posterior margin of segments narrowly white pollinose, 

 rather broader on the sides, a narrow, median, white pollinose stripe 

 over all segments, last segments with only a pair of small dark spots. 

 Legs black, base and extreme tip of femora, base, middle and tip of 

 tibia and the tarsi pale. Front, thorax, abdomen and legs with moder- 

 ately long black hair. Wings gray, yellowish on base and near stigma; 

 anterior and posterior cross-veins plainly broadened with blackish, 

 and a distinct rounded cloud abov€ the posterior cross-vein in the first 

 posterior cell, latter closed before tip. All femora much thickened 

 as in M . willistoni. 



Length, 4.5 mm. 



From Pullman, Wash., 6 May (Melander). 



Myopa clausa Loew. 



I have considered as this species a reddish form with 

 extremely long proboscis ; it occurs in the East, and I have two 

 from Utah (Spalding), also one from Mt. Graybeard, N. Car. 



Myopa longipilis n. sp. 



Black, face yellowish white, with fairly long white hair; front 

 brown, showing the usual V-mark; antenna dark, second joint a little 

 longer than the third; head from in front almost circular; in some 

 specimens a faint dark cloud on each cheek; proboscis black, second 

 joint about two-thirds of head height; third joint about equal to the 

 second. Thorax rather reddish on sides and behind; abdomen reddish 

 toward tip, or on the sides, some of the segments narrowly white 

 pollinose on sides behind. Legs reddish, on the femora largely blackish, 

 except base and tip, tarsi pale. Front, thorax, abdomen and legs with 

 long black hairs, fully as long as in M. vicaria. Wings rather pale 

 brownish yellow, without dark clouds. 



Length, 9.5 mm. 



From Pullman, Wash., April and May (Melander). 



