CTJLEX TOWEEI 281 



triangular patch ; single spine elongate, widened at tip, fringed with spinules. 

 Anal segment longer than wide, ringed by the plate ; dorsal tuft a group of long 

 hairs on each side; ventral brush well developed, confined to the barred area. 

 Anal gills longer than the segment, rather sharply tapered. 



The larvae live in ground-pools. Mr. Knab found them in an old tank about 

 2 feet square at the river margin under a bridge, in a large muddy puddle in the 

 bed of a stream in a well-shaded ravine, and in a shallow pool frequented by 

 cattle, partly shaded by a large tree. 



Mexico and Costa Eica. 



Santa Lucrecia, Mexico, June 19, 1905 (F. Knab) ; Almoloya, Oaxaca, 

 Mexico, July 19, 1905 (P. Knab) ; Las Loras, near Puntarenas, Costa Eica, 

 September 9, 1905 (P. Knab). 



One of the Santa Lucrecia specimens was originally referred to Culex in- 

 quisitor, through an error. 



CULEX TOWERI Dyar & Knab. 



Vulex toweri Dyar & Knab, Journ. N. Y. Bnt. Soc, xv, 13, 1907. 

 Culex toweri Theobald, Mon. Culic, v, 613, 1910. 



ObIGINAI DESCEIPTION of CtlLEX TOWEBi: 



Head behind the eyes margined with silvery gray; thorax clothed with rather pale 

 yellowish brown scales above with faint traces of dorsal stripes; abdomen entirely 

 black above, beneath with white lateral basal spots and a pale median area. Wings 

 with the veins and fringe dark brown scaled. Hind legs black with the first to fourth 

 tarsal joints narrowly white ringed at both ends, fifth joint white ringed at the base; 

 knees white tipped, tibiae rather broadly white tipped ; on the first and second pairs 

 of legs the annulations are much reduced. Proboscis and palpi black. 



39 specimens, Mayaguez, Porto Rico (W. V. Tower) . , 



Type. — Cat. no. 10222, U. S. Nat. Mus. 



The larva falls with Culex lamentator D. & K. in the table and is much like it, but 

 the adults are quite distinct. 



DESCEIPTION or FEMAT.E, MAIE, and LaBVA of CtnOEX TOWEEI : 



Female. — Proboscis moderate, subcylindrical, uniform, labellse pale, conically 

 tapered; vestiture brownish black, setae minute, curved, black, those on the 

 labellse more prominently outstanding. Palpi small and slender, about one- 

 fourth as long as the proboscis, black, with a few outstanding setas. Antennae 

 with the basal joints somewhat shorter, rugose, pilose, black, the second joint 

 slightly enlarged; tori subspherical, with a cup-shaped apical excavation, 

 luteous, blackish on inner side ; hairs of^whorls sparse, moderate, black. Clypeus 

 rounded triangular, doubly excavated at base, dark brown, nude. Byes black. 

 Occiput brown, clothed with narrow, curved, lustrous pale-brown scales on 

 vertex and many erect, forked ones, pale brown mesially, black at sides, broad 

 white ones on sides below ; a row of black bristles along margins of eyes, which 

 are white scaled. 



Prothoracic lobes elliptical, remote dorsally, clothed with white scales and 

 brown setas. Mesonotum light brown, with two dorsal, impressed, paler brown 

 lines showing on anterior half ; vestiture of narrow, curved, lustrous light-brown 

 scales, paler around the margins and ante-scutellar space, in a median line and 

 a pair of subdorsal spots; bristles black. Scutellum trilobate, brown, clothed 

 with pale scales, each lobe with a group of blackish bristles. Postnotum ellip- 

 tical, prominent, luteous, nude. Pleurae and coxae luteous, with small patches 

 of white scales and with rows of small brown bristles. 



Abdomen subcylindrical, depressed, truncated at tip; dorsal vestiture black 

 with a slight greenish and bronzy reflection, a row of lateral basal-segmental, 

 triangular, dull silvery- white spots showing posteriorly from a dorsal view; 

 venter whitish, with transverse black bars at tips of segments ; a row of yellowish 

 hairs at tip of each segment dorsally. 



