852 MOSQUITOES OF NORTH AMERICA 



pecten extending nearly to tip, of very long teeth on basal half, shorter and 

 slightly more sparse beyond ; a slender hair-tnft a little beyond middle of tube ; 

 sino-le pecten-tooth a long simple tapered spine. Lateral comb of eighth seg- 

 ment a series of long, stout, bar-like scales in a straight row; single scale a long 

 tapering shaft, six times as long as wide, fringed with short spinules. Anal 

 segment about as long as wide, with a dorsal plate reaching well towards ventral 

 line, densely pilose, and with a row of long spines on posterior margin, a 

 multiple tuft at posterior angle ; dorsal tuft a long hair and a tuft of very long 

 hairs on each side ; ventral brush very large, inserted in a rhomboidal chitinous 

 plate, which it pierces in a double row of alternating holes ; anal gills long, 

 regularly tapered. 



The larvae live in the water between the leaves of Bromeliaceae. Dr. Grabham 

 found them in TiUandsia utriculata Linnaeus and Caraguata lingulata (L.) 

 Lindley. He says that the larvae are very timid, hurrying to the bottom on the 

 slightest provocation. Confined in a bottle they avoided light and stayed on the 

 dark side. The length of the pupa stage is nearly four days. In the larva the 

 pecten of the breathing-tube shows considerable variation; in some specimens 

 the pecten-teeth are nearly evenly spaced to the end, in others the last third of 

 the pecten consists of a few well separated teeth. 



Island of Jamaica, West Indies. 



Mavis Bank, 5000 feet (M. Grabham). 



It would seem as if Aedes walkeri should have representatives on other islands 

 of the Greater Antilles, but such have not come to hand. More careful col- 

 lecting may, however, reveal them, as very little has been done towards investi- 

 gating the mosquito fauna of the Bromeliaceae in those islands. 



AEDES QUADRIVITTATUS (Coquillett) Dyar & Knab. 



Culex quadrivittatus Coquillett, Can. Ent., xxxiv, 293, 1902. 

 Gulex quadrivittatus Blanchard, Les Moustiques, 628, 1905. 

 OchJerotatus quadrivittatus Coquillett, U. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 20, 



1906. 

 Aedes quadrivittatus Dyar & Knab, Journ. N. Y. Ent. Soc, xv, 11, 1907. 

 Culex quadrivittatus Theobald, Men. Culic, v, 395, 1910. 

 Aedes quadrivittatus Theobald, Mon. Culic, v, 486, 1910. 

 Aedes quadrivittatus Picado, Bull. Scient. France, Belg., 7 ser., xlvii, 353, 1913. 



Original Description of Citlex quadrivittattts : 



$. Differs from atropalpus as follows: Scales at apices of palpi and several on 

 the upper side white, scales of occiput yellowish and with four patches of black 

 ones; scales of mesonotum black with four vittae. and lateral margin of golden 

 yellow ones; abdomen black scales, each segment with a lateral patch of white ones 

 extending nearly to the middle of the venter; scales of legs at apices of tibiae and 

 of joints of tarsi black, on the last two joints of the hind tarsi wholly black, tarsal 

 claws simple. 



Length, 4.5 mm. Eight females received, June 13, by Dr. L. 0. Howard from Prof. 

 Gustav Eisen, of San Francisco, Cal. Type: No. 6560, U. S. N. M. 



Habitat. Chacula, Guatemala (6,600 feet altitude). 



Description of Female of Aedes quadrivittatus (Male and Larva Unknown) : 



Female. Proboscis rather long, subcylindrical, uniform; vestiture black; 

 setae minute, curved, black, those on labellae more prominently outstanding. 

 Palpi about one-fifth the length of the proboscis ; vestiture black, tip narrowly 

 silvery-white. Antennae filiform, the joints subequal, rugose, coarsely pilose, 

 dark brown ; second joint swollen ; tori subspherical, with a cup-shaped apical 

 excavation, luteous, brown and with a group of small pale-yellow scales on inner 

 side. Clypeus elliptical, prominent, dark brown, nude. Eyes black. Occiput 

 clothed entirely with broad, flat appressed scales, those along middle line but 

 slightly narrowed, brownish-black, a broad, pale golden-yellow median line, a 



