812 MOSQUITOES OF NOETH AMEBICA 



Prothoracic lobes elliptical, prominent, separated dorsally by their own width, 

 black, clothed with silvery-white scales and coarse black bristles, apical angles 

 with violet-black scales. Mesonotnm black, clothed with narrow, elliptical, blue- 

 black scales and a narrow mid-dorsal line of broader silvery-white scales, the line 

 continued over the antescutellar space; a silvery-white patch below anterior 

 angles and one at margins before roots of wings, continuous with pleural 

 vestiture. Scutellum trilobate, with black scales except on the middle lobe on 

 which the white mesonotal stripe is continued ; each lobe with a small group of 

 dark brown bristles. Postnotum short, elliptical, blackish brown, shining, 

 nude. Pleurae and coxae black-brown, clothed with patches of silvery-white 

 scales and rows of dark bristles. 



Abdomen subcylindrical, flattened, slightly tapering posteriorly, ventrally 

 produced into a median longitudinal ridge and with the sixth and seventh seg- 

 ments apically expanded, eighth segment small; dorsal vestiture black with a 

 violet-blue reflection, a series of*large, lateral, triangular silvery-white patches, 

 those on last four segments dorsally produced, nearly joining medianly on the 

 sixth, and joining on the seventh and eighth segments to form subbasal bands; 

 first segment with black scales and fine pale hairs ; venter with basal half of seg- 

 ments silvery-white, apical half black, last segment entirely black. 



Wings rather narrow, hyaline; petiole of second marginal cell half as long 

 as its cell, that of second posterior cell longer than its cell ; basal cross-vein more 

 than its own length distant from anterior cross-vein; scales deep brown, bluish 

 along costa, small and narrow, the outstanding ones narrowly ligulate, denser 

 on second vein and broader towards tip of wing. Halteres luteous, with black, 

 white scaled knobs. 



Legs slender, rather long; vestiture blue-black, slightly outstanding at ends 

 of tibiae ; front femora entirely dark scaled ; mid femora white beneath on basal 

 two-thirds, expanded at that point to nearly encircle femur, apices broadly 

 silvery-white; hind femora pale beneath and on outer side to apical fourth, 

 apically broadly silvery-white scaled ; knees of front legs narrowly white scaled. 

 Claw formula, 1.1-1.1-0.0. 



Length : Body about 4 mm. ; wing 3 mm. 



Male. — This sex is not represented in the National Museum. Dr. Peryassu 

 says that the antennae are very plumose, the last two joints long; the palpi are 

 black, long, and slender, slightly shorter than the proboscis, with some 

 scattered long hairs on the outer portion; the claws of the front and middle 

 tarsi are unidentate, those of the hind simple. 



Dr. Peryassu found the larvae in a tin, associated with Limatus durhamii 

 and Aedes calopus. Dr. Lutz collected them in bamboo, Mr. Urich and Mr. 

 Jennings from tree-holes, but unfortunately neither obtained a larval skin. 



Forested regions of tropical America. 



Alhajuela, Chagres Kiver, Canal Zone, Panama, March 18, 1909, larvae asso- 

 ciated with Aedes thorntoni (A. H. Jennings) ; Caldera Island, Porto Bello Bay, 

 Panama, May 33, 1908 (R. L. Turner) ; Trinidad, June 6, 1906 (F. W. 

 Urich) ; Eio Charape, Peru, September 18, 1911 (C. H. T. Townsend). Also 

 reported from the States of Sao Paulo, Eio de Janeiro and Minas Geraes, Brazil 

 (Lutz, Peryassu). 



AEDES PODOGRAPHICUS Dyar & Knab. 



Aedes insolita Dyar & Knab (not CoqulUett), Journ. N. Y. Ent. See, xlv, 203, 1906. 

 Aedes insolita Dyar (not CoqulUett), Proc. Ent. Soc. Wash., vlll, 16, 1906. 

 VerralUna insolita CoqulUett (In part, not CoqulUett), U. S. Dept. Agr., Bur. Ent., 



Tech. Ser. 11, 17, 1906. 

 Aedes podographicus Dyar & Knab, Proc. Biol. Soc. "Wash., xlx, 165, 1906. 

 Aedes podographicus Theobald, Men. CuUc, v, 484, 1910. 



