ART. 11. FLIES OF THE FAMILY CLUSIIDAE MELANDER AND ARGO. 43 



prescutellar setae present. Abdomen yellowish, base and apex 

 somewhat brown, ovipositor yellow. Legs yellow, middle tibiae 

 with preapical bristle. Wings infumatcd along costa and tip, else- 

 where cinereous, third vein curving back to end almost at wing-tip, 

 costal sections 5 : 1.2 : 1. fourth vein 1.2 : 1 :4; halteres yellow. Length 

 3.5 mm. 



Distribution. — Massachusetts, New Jersey, Pennsylvania, District 

 of Columbia, Indiana, Illinois. Shannon has taken the species on 

 Plummer Island, Md., and at Dead Run, Va. 



The species is similar to fiava, differing in the greater approxmiation 

 of the crossveins, the more extended infumation of the wings, darker 

 thoracic markings, and in the presence of setae along the antero- 

 flexor edge of the front femora. 



68. SOBAROCEPHALA LATEPENNIS, new species. 



('Fig. 24.) 



Male. — Front and center of face brown, cheeks yellow, antennae 

 and mouthparts luteous, arista three and three-fourth times the 

 length of the antenna, short-plumose, almost openly pubescent, 

 cephalic bristles strong and black, four buccal hairs; head remark- 

 ably wide, front broader than eye. Mesonotum mostly black, a 

 broad C-shaped yellov/ spot on each side enclosing the suture, scutel- 

 lum black, metanotum brownish, pleurae whitish, metapleura black. 

 Abdomen black except at yellowish base, hypopygium small, with 

 yellowish valves. Legs yellow with exception of all tibiae and front 

 tarsi which are blackish, about twelve pale setae in posterior row of 

 front femora, only two prominent setae in posterior row of middle 

 femora. Wings broad, only twice as long as wide, costa strongly 

 arched and aciculate, second vein abbreviated and bent forward to end 

 midway between tip and posterior crossvein, costal ratio 2.5 : 2 : 1, 

 fourth vein 1 : 2.5, fifth vein 3.5 : 1; outer half of wing strongly 

 infumated, contrasting with hyaline basal half; halteres whitish. 

 Length 3 mm. 



Type and trro paratypes. — ^Turrialba, Costa Rica, Pablo Schild 

 collector, in Melander collection. Paratype: Porto Bello, Panama, 

 August Busck, in National Museum, Cat. No. 26273, U.S.N.M. A 

 beautiful species allied to S. liturata but differing from all the species 

 in its curious wing formation. 



69. SOBAROCEPHALA LITURATA, new species. 



(Fig. 42.) 



Male. — Front and face brownish, facial orbits and cheeks white, 

 the bucca rimmed with brown, mouthparts and antennae yellow, the 

 black short-plumose arista three and a half times the antennal 

 length, four short buccal hairs, cephalic bristles strong and black, 



