AhT. 11. FLIES OF THE FAMILY CLUSIIDAE MELANDER AND ARGO. 47 



fourth vein 1.2:1:3.6, of fifth vein 1.5:1; hal teres pale yellow. 

 Length 3.4 mm. 



Holotype. — ^La Suiza de Turrialba, Costa Rica, November, 1922 

 (Pablo Schild), in Melander collection. 



76. SOBAROCEPHALA RCbSAAMENI Czerny. 



(Fig. 23). 



Sobarocephala rubsaameni Czerny, Wien. ent. Ztg., vol. 23, p. 86, pi. 3, figB. 3-5 

 (1903). 



Entire head reddish yellow, ocellar spot black, front shining, 

 arista black and short-plumose, twice antennal length; head bristles 

 reddish and strong, five long buccal hairs. Thorax shining reddish 

 yellow, posterior part of mesonotum maculate with black, sometimes 

 a smaller posthumeral blackish spot present, scutellum yellow, the 

 tip sometimes black, pleurae yellowish, metathorax varying from 

 black to yellow; prescutellar setae present, two pairs of lateral 

 scutellar setae. Abdomen yellowish, with lateral blackish spots 

 on second, fourth, fifth, and sixth segments. Legs yellowish, front 

 tarsi somewhat dusky, flexor setae not developed on femora. Wings 

 yellowish, pictured with brown markings, one forming a transversely 

 oblique stripe between the ends of the first and anal veins, a second 

 forming an oval spot at the end of the second vein, the third including 

 the apex and following the last section of the fourth vein and the 

 posterior crossvein, sometimes filling the second posterior cell; 

 costal ratio 2.5:1.3:1, fourth vein 1:1:1.5, fifth vein 4:1; halteres 

 and calypteres yellow. Length 5 mm. 



Distrihution. — Five sepcimens collected by Pablo Schild in Costa 

 Rica and by August Busck at the Trinidad River, Panama. The 

 type specimen, on which Czerny erected the genus Soharocephala, 

 came from Peru. As preapical bristles are well developed on the 

 specimens before us they were probably broken from the type. 



77. SOBAROCEPHALA SETIPES, new species. 



(Fig. 26.) 



Male. — Front shining yellow, ocellar spot black, mouthparts and 

 antennae yellow, arista black, plumose, cheeks not silvery, head 

 bristles yellowish brown, three fine buccal hairs. Dorsum shining 

 ochraceous, pleurae paler, sternal hairs not conspicuously abundant, 

 prescutellars undeveloped, only one lateral seta on scutellum. Ab- 

 domen brown except at the yellowish base, sides and venter; hypo- 

 pygium yellowish, small, the end valves round and minute. Legs 

 yellowish, front tarsi dusky, anterior flexor bristles of front femora 

 vestigial, about fourteen in posterior row, middle femora with two 

 flexor rows of strong, close, outstanding bristles, about twenty in the 

 posterior row and ten in the anterior. Wings yellowish hyaline, 



