140 ENTOMOLOGICAL SOCIETY 



seems to have had only two abdominal fasciae, while Loew's 

 had three, and a specimen of my own four. (See trifasciala.') 

 Walker describes the $ , and his description is sufficiently 

 recognizable to stand, certainly so if the locality had been 

 appended. The species, however, cannot fail to be American, 

 as I know of no Trichopoda from any other part of the world. 



Trichopoda aurantiaca nov. sp. 



Male Black and orange ; like T. formosa Wied., but smaller and less 

 robust. Head rather wide, eyes large, brownish ; front about one-fourth 

 the width of the head, the velvety black vitta occupying its entire 

 width at the vertex and a little widened at the bases of the antennae ; 

 sides of front and borders of eyes below golden yellow ; face silvery pol- 

 linose, a blackish shining surface just above the epistoma ; antennae, in 

 cluding bristle, blackish, slightly silvery in some lights ; cheeks yellow 

 ish, silvery pollinose and gray hairy ; mouth parts light, proboscis black 

 or brownish, palpi very dark brown ; occiput black, silvery pollinose. 

 Thorax black, with four short longitudinal brassy, slightly whitish, lines 

 in front running back to a transverse one, the inner pair and the trans 

 verse line very delicate, the outer pair heavy and somewhat golden ; 

 thorax with black macrochetse on the sides and hind portion, hind bor 

 der silvery ; scutellum black, silvery behind, with a black macrocheta on 

 each side and a pair at the hind angle ; pleurae silvery pollinose. Abdo 

 men flattened, rather square oblong, not very wide, of a light orange 

 color shading into rusty toward the tip, its extreme base more or less 

 black, everywhere covered with short black bristly hairs ; anal segment 

 with a silvery reflection ; venter concolorous. Legs black, thickly 

 clothed with short black bristles, the bases of the femora orange ; coxae 

 silvery ; hind tibiae thickly black ciliate, or feathered ; claws and pul- 

 villi yellow, elongate, surmounted with a few fine, black, bristly hairs. 

 Wings black, slightly white radiate, with an elongate longitudinal yellow 

 or tawny spot in the middle near the front border ; inner margin of 

 wings narrowly hyaline, not reaching the apex; tegulae light orange, 

 forward angle pure white ; halteres orange. 



Length of body, 1 1 mm. ; of wing, 9 mm, 



One specimen. Dixie Landing, Va. (D. C.). July 6, on 

 sumach bloom. This species is near formosa. It differs from 

 it in being less robust, in the much smaller and narrowed ab 

 domen, which is orange-colored. From cilipes (syn. hirtipes) 

 it differs in the smaller, rather square oblong abdomen of 

 equal width, not bulging on the sides, and the delicate 

 whitish brassy, not heavy golden, markings of the thorax. Of 

 course, in the above differences I refer only to the $ $ . I 

 have a single 9 that may belong to this species, but it is 

 doubtful. The abdomen is narrower, more cylindrical, more 



