8 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 64 



Female. — Similar to male except that anterior tibiae and tarsi are 

 black and the abdomen shining with an obscure dorsal line and 

 black tip. Length 3 mm. 



Habitat. — New Jersey. Types in collection of C. W. Johnson 

 Boston. The two types are the only specimens recorded of this 

 species. We have not seen it, and quote the original description. 



8. CHAETOCLUSIA BAKERI Coquillett. 



(Fig. 16.) 



Chaetoclu^ia hdkeri Coquillett, Proc. Ent. Soc. Wash., vol. 6, p. 93 (1904). — 

 Malloch, Proc. Ent. Soc. Wash., vol. 20, p. 5 (1918). 



Head and its members yellow, polished, the bushy plumose apical 

 arista and ocellar dot black, a brownish spot on outer side of third 

 antennal joint; thorax yellow, sides of mesonotum black, prolonged 

 downward in front of and behind each wing, and inward at each end 

 of the mesonotum, the two ends connected by a second black vitta 

 extending along the dorsocentral rows; scutellum yellow, with 

 brownish sides or wholly black; abdomen black, the extreme base 

 and sometimes a pair of spots at bases of segments four to six, the 

 genitalia and venter, yellow; legs yellow, basal half of middle or 

 hind tibiae usually brownish, femora devoid of bristles, middle tibiae 

 bearing a stout apical spur on the inner side and the preapical bristle 

 on the outer side; wings largely hyaline, apex brownish, this color 

 extending to the middle of last section of third vein, an indistinct 

 brownish cloud covering the crossveins, last section of fourth vein 

 about seven times as long as preceding section; halteres yellow, all 

 hairs and bristles yellowish; length 4 mm. 



Hahitat. — Originally described from Nicaragua, type in National 

 Museum. Five specimens before us, collected by Pablo Schild in 

 Costa Rica. 



.CHAETOCLUSIA LONGEFILATA, new species. 



(Fig. 12.) 



General color testaceous, antennae and palpi flavous, ocellar spot 

 brown, arista brownish, three times the antennal length, openly 

 pubescent, bristles concolorous with body at their place of origin, 

 buccal hairs all small. Thorax with light brown sides between 

 dorsocentral rows and root of wing, each stripe paler along its middle, 

 humeri, central stripe, and scutellum testaceous, metanotum brown- 

 ish, pleurae, halteres and base and more or less of fifth segment of 

 abdomen flavous, middle of abdomen and apex castaneous, hypopy- 

 gium large, inflexed, the valves testaceous and remarkably long, 

 acuminate, reaching to base of abdomen; no prescutellars. Wings 

 and veins yellowish, the anterior half of the apical half infumated, 



