PSOROPHORA CHAMPERICO 563 



PSOROPHORA CHAMPERICO (Dyar & Knab). 



Janthinosoma champerico Dyar & Knab, Proc. Biol. Soc. Wash., xix, 134, 1906. 

 Janthinosoma champerico Theobald, Mon. Culic, v, 603, 1910. 



Original Description of Janthinosoma champerico: 



Hind legs with raised scales; last two joints of hind tarsi white; abdomen all 

 yellow scaled below; else as in J. lutzii Theobald. 



One specimen, Champerico, Guatemala (F. Knab). 



Type. Cat. No. 9968, U. S. Nat. Mus. 



Description of Female of Psorophora champerico (Male and Larva Unknown) : 



Female. Proboscis slender, rather long, uniform, labellae conical and a little 

 thickened at base ; clothed with dense blue-black scales and very small black setae, 

 those on labellae more prominently outstanding. Palpi about one-third as long 

 as proboscis, clothed with blue-black scales and rather long bristles. Antennae 

 slender, rugose, pilose, blackish ; second segment yellowish, smooth and slightly 

 thickened on basal two-thirds, slightly longer than the succeeding ones; tori 

 subspherical, with a cup-shaped hollow at tip, pale without, blackish within. 

 Clypeus elliptical, prominent, convex, blackish, nude. Eyes blue black. Occi- 

 put roundedly prominent, clothed with broad, curved golden yellow scales, 

 many upright, forked yellow scales on the nape, some very narrow scattered 

 ones before, a patch of flat black ones at middle of each side; coarse blackish 

 bristles along margins of eyes, a tuft of yellow ones projecting at vertex. 



Prothoracic lobes rather large, blackish, sparsely clothed with broad, curved 

 golden-yellow scales throughout and numerous blackish bristles. Mesonotum 

 black; a broad median stripe widening posteriorly, rather uniformly clothed 

 with narrow brownish-black scales and rows of sparse, short black bristles ; 

 anterior edge narrowly and sides of disk broadly clothed with broad, curved 

 golden-yellow scales and numerous rather short black bristles, a short line of 

 broad, curved golden-yellow scales on each side at base near ante-scutellar bare 

 space. Scutellum trilobate, blackish brown, sparsely clothed with broad golden- 

 yellow scales, each lobe with a group of brown bristles. Postnotum elliptical, 

 prominent, nude, blackish brown with a slight whitish pruinosity. Pleurae 

 blackish, largely covered by dense, flat, elliptical pale-golden scales. Fore and 

 hind coxse pale testaceous, with a few pale-golden scales and many pale bristles; 

 mid coxae blackish, with blue-black scales and black bristles. 



Abdomen subcylindrical, posterior segments distinctly tapered; cerci promi- 

 nently projecting; dorsal vestiture of small violet-black scales, the sides ob- 

 liquely golden-yellow scaled ; first segment clothed dorsally with flattened pale- 

 yellow scales and with many fine pale setae; venter densely clothed with flat 

 golden-yellow scales, continuously at base, further on with small median patches 

 of blue-black scales at bases of segments, which become larger distally, the 

 seventh segment being almost wholly black below. 



Wings rather narrow, the membrane faintly infuscated, more distinctly so 

 towards costa; petiole of second marginal cell but a little shorter than the cell, 

 that of second posterior cell considerably longer than cell ; basal cross- vein con- 

 siderably less than its own length from anterior cross-vein ; veins blackish, the 

 scales brown with violet luster, the outstanding ones on apical half of wing 

 broadly linear. Halteres with a pale stem and brownish knob and silver}- 

 scales at apex. 



Legs long and slender; femora basally yellow, the hind ones clothed with 

 small golden scales to apical fourth, mixed with a few black ones dorsally, the 

 distal part violet-black ; knees narrowly white ; front and middle femora mostly 

 violet-black scaled ; tibiae and tarsi violet black, vestiture on outer half of pos- 

 terior tibiie and on the first three tarsal joints dense and partly erected ; last two 



