PSOROPHORA CYAXESCENS 567 



PSOROPHORA CYANESCENS (Coquillett). 



Culex cyanescens Coquillett, Journ. N. Y. Ent. Soc, x, 137, 1902. 



Feltidia cyanescens Dyar, Journ. N. Y. Ent. See, xlii, 55, 1905. 



Feltidia cyanescens Dyar, Proc. Ent. Soc. Wash., vii, 47, 1905. 



Lepidosia cyanescens Coquillett, Science, n. s., xxiii, 314, 1906. 



Lepidosia cyanescens Coquillett, U. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 16, 1906. 



Aedes cyanescens Thibault, Proc. Ent. Soc. Wash., xii, 17, 1910. 



Lepidosia cyanescens Theobald, Mon. Culic, v, 627, 1910. 



Originai. Description of Culex cyanescens : 



Black, the stems of the halteres and the femora except their apices, yellow; occiput 

 rather densely covered with broad, appressed, yellow scales and narrow, upright, 

 yellow ones changing to black at the sides and posterior edge, a spot of violet blue 

 appressed scales near middle of each outer edge of the occiput; palpi covered with 

 broad, appressed, violet blue scales; mesonotum and scutellum rather densely covered 

 with broad, appressed, brassy yellow scales, the pleura with whitish ones; abdomen 

 densely covered with deep blue scales, the posterior angles of each segment, whole 

 of the first and of the venter covered with brassy yellow scales, the spots at the pos- 

 terior angles of the segments considerably produced forward at their inner ends; 

 scales at apices of femora, on hind tibiae and front side of the others, also on tarsi, 

 violet blue; tarsal claws large, one-toothed; wings grayish hyaline, veins chiefly 

 blue, lateral scales narrow and elongate, petiole of first submarginal cell four-fifths 

 as long as the cell, posterior cross-vein about its own length from the small; length, 

 4 to 5.5 mm. 



Habitat: Brownsville, Texas. 



Type: Cat. No. 6308, U. S. N. M. 



Six females collected in May and on June 4. 



Descbiption of Female, Male, and Labva of Psokophora cyanescens: 



Female. Proboscis moderate, cylindrical, slender, uniform ; labellce stout and 

 rather long; vestiture of dense blue-black scales, setas curved and very small, 

 those on labellae prominently outstanding. Palpi rather more than one-fourth 

 the length of the proboscis, stout, clothed with metallic blue-black scales, the 

 sets small. Antennae rather stout ; joints subequal, rugose, black, densely pale 

 pilose, second joint dull luteous, slightly swollen; tori brown, with a patch of 

 whitish scales on inner side ; hairs of whorls short and sparse. Clypeus elliptical, 

 prominent, shining blackish, nude. Eyes black. Occiput blackish, short, con- 

 vex, clothed with broad, curved soiled-whitish scales, a patch of dark violet ones 

 at the sides, some yellowish, narrow, erect forked ones behind; bristles near 

 ocular margins rather short, black, some whitish ones projecting at vertex. 



Prothoracic lobes moderate, brown, clothed with broad, curved soiled-silvery 

 scales and rather numerous short dark bristles. Mesonotum black, vestiture of 

 dense, broad curved soiled-silvery scales intermixed with some narrower brown 

 ones with slight blue reflection, especially on center of disk but not forming any 

 defined pattern; no bare stripes; bristles numerous, short, blackish. Scu- 

 tellum trilobate, blackish, each lobe with a few soiled-silvery scales and with 

 about ten pale bristles. Postnotum elliptical, convex, black with a dull prui- 

 nosity, nude. Pleurae blackish, rather densely clothed with broadly elliptical 

 sordid white scales ; coxse luteous, with whitish scales and black bristles. 



Abdomen subcylindrical, posterior segments distinctly tapering, dorsum de- 

 pressed ; vestiture dorsally of dark metallic violet-blue scales, with pale-golden, 

 broad apical bands, narrowed towards the sides, interrupted in the middle on 

 all but the first two segments ; at the sides the bands are produced forward and 

 become confluent along sides of basal segments; venter j^ellowish- white scaled, 

 the seventh segment dark violaceous. 



Wings rather broad, hyaline with a slight smoky tinge along anterior border, 

 the membrane with an iridescent reflection; petiole of second marginal cell 

 about as long as its cell, that of second posterior cell somewhat longer; basal 

 cross-vein much less than its own length distant from anterior cross- vein ; veins 



