PSOROPHORA SAYI 555 



Original Desckiptiok of Janthinosoma sayi (Theobald) : 



Synonymy. — Coquillett makes Say's musicus the same as Wiedemann's posticatus. 



The latter species has the last hind tarsal white. 



The specimens I re-described of posticata (p. 253, Vol. I) answer exactly to Wiede- 

 mann's description, and musieus of Say is seen to be totally distinct. Unfortunately 

 Say's name, musieus (1827), was used in 1825 by Leach for a Culex, and thus does 

 not stand. I have thus renamed the insect after its descrlber. 



Description of Female, Male, Larva, Pupa, and Egg of Psobophora sayi: 



Female. — Proboscis moderately long, uniform; labellse rather sharply 

 tapered, with a few small outstanding setae; vestiture of appressed brownish- 

 black scales. Palpi less than one-third as long as proboscis, clothed with black 

 scales with a bright blue luster, tipped with brilliant violet scales. Antennae 

 black, the joints subequal, pilose; tori subglobose, with a cup-shaped apical 

 hollow, pale luteous within, brown without; second joint luteous at base, with 

 a few black scales ; hairs of whorls sparse, rather short, black. Clypeus promi- 

 nent, elongate elliptical, rounded at both ends, nude, blackish brown, shining. 

 Eyes black. Occiput dark brown anteriorly, luteous posteriorly, posterior half 

 densely clothed with erect, slender, forked, golden-yellow scales, intermixed 

 with very broad, yellow, flat and suberect scales, some subovate, whitish scales 

 anteriorly and on the cheeks, some yellow hairs projectiag at the vertex. 



Prothoracic lobes blackish brown, moderate in size, remote, with a cluster of 

 flat, broad white scales on the summit and brownish-tipped setae below. Meso- 

 notum nearly black, covered with flat, broad golden-yellow and blackish-brown 

 scales intermixed, forming no defined pattern; dorsal bare stripes hardly in- 

 dicated; ante-scutellar bare space small; a number of brownish-tipped setae, 

 longest and most numerous posteriorly and at roots of wings. Scutellum trilo- 

 bate, dark brown, middle lobe the most prominent, blackish centrally, each 

 lobe with flat golden scales and a group of about eight long black setae. Post- 

 notum elliptical, brown, shining, nude. Pleurae dark brown, clothed with broad, 

 white appressed scales ; coxae pale, with patches of white scales and rows of brown 

 bristles. 



Abdomen subcylindrical, flattened, terminal segments distinctly tapering; 

 clothed dorsally with flat black scales with a bright violet luster, a series of 

 large, lateral, triangular, whitish yellow spots, their bases at apices of the seg- 

 ments; venter entirely clothed with whitish-yellow scales with a very few 

 blackish ones intermixed; seventh segment violet beneath with whitish yellow 

 lateral and posterior margins ; setae not abundant, rather short, dark. 



Wings moderate, membrane hyaline with a very slight smoky tint and an 

 iridescent reflection ; petiole of second marginal cell shorter than its cell, that of 

 second posterior cell also somewhat shorter; basal cross-vein less than its own 

 length distant from anterior cross-vein; veins dark brown, the smoky color 

 slightly intensified in their immediate vicinity; scales brownish black, the out- 

 standing ones slender, narrowly lanceolate, most of them blunt at tips. Halteres 

 almost entirely pale. 



Legs rather long and slender, posterior legs with the apical third of the tibiae 

 and the three proximal tarsal joints apparently thickened by dense obliquely 

 outstanding scales; femora pale yellowish brown beneath nearly to tips; apices 

 of femora white scaled, broadest on hind pair; legs otherwise clothed with black 

 scales with a bright violet-blue metallic luster, last two joints of hind tarsi and 

 tip of third joint white. Claw formula, 1.1-1.1-1.1. 



Length : Body about 5 mm. ; wing 4.5 mm. 



Male.— ProhosciB straight, moderately long, nearly uniform. Palpi exceed- 

 ing the proboscis by somewhat less than the length of the last two joints; the 

 two terminal joints thickened, the penultimate one the longer; vestiture black 

 with a bright blue reflection; last two joints and apex of long joint with long 



