256 SMITHSONIAN MISCELLANEOUS COLLECTIONS [vor. 48 
golden-green and olivaceous, the extreme lateral margins bright 
blue; hind margin bright green. Patches over the roots of the 
wings brilliant blue. Scutellum silvery blue. Pleure and coxe 
silvery white. Abdomen: first segment silvery, a patch of blue in 
the middle; second segment green, the following ones steel blue and 
purple to deep golden; the gold begins on the fourth segment and 
is diffused over the entire surface of the much dilated sixth and 
seventh segments; eighth segment violet; genitalia covered with 
deep blue scales. Sixth segment with a few reddish hairs at the 
hind angles; seventh and eighth segments with lateral fringes of 
brilliant red hairs, particularly ample on the seventh segment; the 
preceding segments with the usual scattered, pale yellow, lateral 
hairs. Beneath golden along the sides, the median area steel blue; 
eighth segment entirely blue. Legs steel blue and reddish purple. 
Femora and hind tibiz golden beneath. 
Female.—Coloration of head and thorax as in the male. An- 
tennz: second segment 14 times as long as the third, hardly stouter, 
a small crest of erect scales on the basal half. Palpi violet blue and 
coppery red, golden beneath; fourth segment longer than second, 
third much longer than fourth. 
Abdomen: first segment bright silvery at the sides, pale blue in 
the middle; second segment green, the third blue and purple, the 
succeeding ones purplish red and bright coppery—the latter shade 
predominating on the sixth, seventh and eighth segments; front 
angles of segments 2-8 bright blue; hind angles of segments 2-6 
broadly golden. No lateral tufts—a few red hairs at the sides of 
the seventh segment. Beneath entirely pale golden. 
Legs steel blue and coppery red. Femora and hind tibize golden 
beneath. On the middle pair of legs the second tarsal segment is 
marked with silvery blue on the inside, visible only in certain posi- 
tions. 
Length, 4-6 mm. 
Type: Na.,o957, US. No. 
Localities: Trinidad (F. W. Urich), Frontera, State of Tabasco, 
Mexico (Townsend). 
2 5, 1 9. The Mexican specimen, a male, shows none of the 
golden scales on the abdomen which is mostly blue and purple. In 
the other specimen the golden scales have the appearance of being 
loosely attached and easily rubbed off. Mr. Urich’s two specimens 
were bred from Bromelias, where the larve prey on those of 
Wyeomyia. The male was but recently received. The female 
