ANOPHELES TARSIMACULATA 977 



narrower than in the female, the stems of the fork-cells longer ; vestiture more 

 sparse, the black spots on the costa less extensive. Claw formula, 2-0.0-0.0. 



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



Genitalia (plate 39, fig. 263) : Side-pieces over twice as long as wide, tips 

 conically rounded; clasp-filament long and slender, slightly attenuated medi- 

 anly, terminally with an articulated, slender pointed spine 'inserted before the 

 pointed apex; two closely approximated stout spines with curved tips before 

 middle of side-piece arising from a common base ; a stout spine close to base ; a 

 basal appendage resemblmg a harpago, spatulate, with roimded tip. 



Larva, _ Stage IV. Head elliptical, longer than wide, the antennpe rather 

 large, spinose on inner side ; dorsal head-hairs and ante-antennal hairs in a row, 

 stout, amply feathered, those above mouth with the central pair nearly simple, 

 the lateral ones distinctly feathered. Abdomen with six pairs of well-developed 

 fan-shaped tufts, preceded by a smaller pair on first segment (plate 130, fig. 

 460) ; lateral plates of eighth segment with long and short irregularly arranged 

 teeth. 



The eggs have been figured and described by Dr. Goeldi (Os Mosquitos no 

 Para, 1905, plate 0, figs. 131, 132, 133). They are elongate fusiform, slightly 

 more tapered toward one end, both ends rounded, granular, black ; the ribbed 

 floats occupy about three-fourtlis of the lateral margins and are separated 

 dorsally by about one-third the diameter of the egg itself; ventrally they are 

 very widely separated. The eggs are 0.424 mm. long and 0.185 mm. wide. 



Theobald quotes Dr. Low on the habits as follows : 



" Breeding-grounds, extremely varied. I have found them in rivers (Domi- 

 nica), large swamps, small swamps, irrigated cane fields, ditches, trenches, 

 canals, small water-courses, small water-holes, depressions made by the hoofs 

 of smaller cattle and other similar places, also in brackish water, and in a lagoon 

 of water shut olf from the sea by a bank of sand only ten yards wide ; the inter- 

 esting point about the latter was that there was no vegetation of any sort in the 

 water except some old sea weed. Any collection of water in the country seems 

 to do for their breeding in, especially when it is more or less thickly grown with 

 algse and other water-plants ... I have never found them in water-barrels, 

 tubs, tanks, wells, or other collections of a similar nature in towns. . . . The 

 larvae die quickly under artificial cultivation if the water is allowed to become 

 foul. The larval stages last fifteen to eighteen days, and the pupal stage two 

 days, 



"The adult insect is not in any sense of the term a domestic or house 

 mosquito. They come in to feed just as it is getting dark and leave again in the 

 mornings as it gets light. Searching many native huts by day invariably gave 

 negative results, , , , They are rarely seen during the day and never in bright 

 sunlight. Imprisoned in test tubes, however, they will readily bite men or 

 animals at any time of the day, , , ." 



Dr. Peryassii states that the larvae are carnivorous and cannibalistic. The 

 larvffi may develop in brackish water. He has found associated with these larvae, 

 those of Aedes calopus, Culex quinquefasciatus, Culex coronator, Acdes fluvia- 

 tilis, Lutzia higoti, Psorophora apicalis, and Limatus durhamii, and he has 

 found them in artificial receptacles, as the above associations would indicate. 



Tropical America; Lesser Antilles and mainland from Nicaragua southward. 



Bluefields, Nicaragua (W. F. Thornton) ; Tabernilla, Canal Zone, Panama 

 (A. Busck) ; Colon, Panama (A. H. Jennings) ; La Boca, Canal Zone, Panama 

 (A. Busck) ; Surinam (H, Polak) ; Schoepmoed, Berbice River, British 

 Guiana, April, 1905 (E, D, Rowland) ; New Amsterdam, British Guiana, May 

 1, 1907 (J. Aiken) ; Trinidad, June, Julv, 1905 (A. Busck) ; St. Joseph, Trini- 

 dad, August 2, 1899 (F. W. Urich) ; Grenada, West Indies, June 9, 1905 (A, 

 Busck), Reported also from Cachoeirinha, Manaos, Brazil (Durham) ; Sao 

 Paulo, Brazil (Lutz) ; Rio de Janeiro, Acre Territory, States of Amazonas, Para, 



