PSOROPHORA COLUMBINE 591 



Orabhamia jamaicensis Theobald (not Theobald), Mon. Culicid., iv, 286, 1907. 

 Culex {Orabhamia) jamaicensis Viereck (not Theobald), 1st Ann. Kept. Comm. 



Health Pa., 471, 1908. 

 Aedes Columbia' Thibault, Proc. Ent. Soc. Wash., xii, 16, 1910. 

 Ch-abhamia jamaicensis Theobald (in part), Mon. Culic, v, 281, 1910. 

 Janthinosoma columbiw Theobald, Mon. Culic, v, 604, 1910. 

 Aedes jamaicensis Morse, Ann. Kept. N. J. State Mus., 1909, 717, 1910. 



Original Description of Janthinosoma columbi.^: 



As in J. toltecum Dyar & Knab, but the abdomen more strongly pale scaled, the 

 third vein with the broad scales in a basal dot only, the scutellum without silvery 

 luster. 



59 specimens, Grassymead, Va. (H. G. Dyar) ; Del Ray and St. Elmo, Va. (F. C. 

 Pratt); Woodstock, Va. (J. Kotinsky); Delair, N. J. (W. P. Seal); Cold Spring 

 Harbor, N. Y. (F. E. Lutz) ; Greensboro, N. C. (F. C. Pratt); Tutuila, Jackson, Bel- 

 zoni, Clarksdale, Corbin, Yazoo City, Miss. (H. S. Barber); Agricultural College, 

 Miss. (G. W. Herrick) ; Baton Rouge, La. (J. A. Morgan). 



Type. Cat. No. 9974, U. S. Nat. Mus. 



Description of Female, Male, Larva, Pupa, and Egg of Psorophora columbi/e: 



Female. Proboscis moderate, cylindrical, uniform, labellae conically tapered; 

 vestiture of small black scales at base and apex, the middle half yellowish white, 

 the edges of this pale area diffused; setae small, curved, black, those on labella 

 more prominently outstanding. Palpi short and stout, about one-fourth as long 

 as proboscis, black scaled with white tips; setae rather long and black. Antennte 

 moderate, the basal joints short, the distal ones longer, rugose, pilose, black ; 

 tori subspherical, with a cup-shaped apical depression, dark brown, with a 

 cluster of white scales within; hairs of whorls sparse, short, black. Clypeus 

 elliptical, prominent, dark brown, nude. Eyes black. Occiput narrow, convex, 

 blackish, clothed with very narrow, curved white scales with a slight violaceous 

 tinge and many slender, erect, forked black ones, densest on the vertex, at the 

 sides a quadrate patch of broad, flat black scales, followed on the cheeks by 

 broad, flat white scales; setae along margins of eyes numerous, black. 



Prothoracic lobes moderate, elliptical, remote dorsally, blackish, clothed with 

 narrow, curved white scales with a faint violaceous reflection and numerous 

 rather short blackish bristles. Mesonotum blackish bro-RTi, with two longitu- 

 dinal impressed stripes, bare at anterior margin, these and a median stripe 

 darker; vestiture of narrow, curved white scales with a violaceous submetallic 

 reflection interspersed among smaller rich golden brown ones ; the bluish scales 

 occur principally in patches on anterior edge, in a distinct spot behind the lateral 

 depressions, along the sides, and bordering the ante-scutellar bare space, but also 

 slightly overspreading the dorsum. Scutellum trilobate, gray, clothed with 

 narrow, curved silvery scales, each lobe with a large group of brown bristles. 

 Postnotum elliptical, prominent, dark brown, nude, slightly pruinose. Pleurae 

 and coxffi blackish brown, clothed with narrowly elliptical white scales and rows 

 of short black bristles. 



Abdomen subcylindrical, flattened, posterior segments tapering; dorsal vesti- 

 ture of black and yellowish-white scales, the pale scales in large subquadrate, 

 transverse, apical patches, forming an uninterrupted band on the second seg- 

 ment, in the following ones divided on the median line, forming sublateral spots 

 which are sometimes again divided transversely into submedian and posterior 

 spots, the last segment almost wholly black; patches of silvery scales at hind 

 angles of segments, lateral margins continuously white scaled; first segment 

 clothed with dull-whitish scales and with many pale-brown setae; venter with 

 black and pale scales intermixed, the pale ones predominating, the black ones 

 tending to form median apical spots on distal segments. 



Wings rather broad, the membrane hyaline with a smoky tinge; petiole of 

 second marginal cell much shorter than its cell, that of second posterior cell 

 shorter than its cell ; basal cross-vein more than its own length from anterior 



