No. 34-] HEMIPTERA OF CONNECTICUT: ALEYRODIDAE. 343 



Pupa case about .70 x .50 mm., light greenish yellow, dorsum 

 somewhat convex, rugose, segmentation evident; dorsal wax 

 secretion in the form of two series of submarginal wax rods, the 

 outer series forming a marginal fringe consisting of from fifty 

 to seventy-five rods whose length is usually less than one-fifth the 

 breadth of the dorsum, usually curving downward over the 

 margin ; the inner series is composed of rods five to ten times as 

 long as the outer ones, usually directed upward and curved over 

 the dorsum, three on either side in front of the mesothorax ; one 

 on each side near base of abdomen, one on each side nearly oppo- 

 site vasiform orifice, and one on each side of groove near caudal 

 margin. Another series arises on the disk of the dorsum; one 

 pair about one- fourth the distance from cephalic margin to base 

 of abdomen; one pair about half of this distance, and the third 

 and fourth pairs on the third and fourth abdominal segments. 

 Vasiform orifice subtriangular, corners rounded, operculum nearly 

 semicircular or reniform; apex somewhat pointed extending 

 slightly more than half the length of the orifice. Lingula with 

 large terminal lobe extending between two spines and three pairs 

 of smaller lateral lobes, longitudinally covered with minute setae. 



Adult female about 1.14 mm. long, fore wing about 1.15X 

 .44mm., white, immaculate; abdomen pale yellow, thorax, legs, 

 head and antennae pale buff, tip of rostrum black; eyes divided. 

 Antennae of seven segments, the third equalling in length the 

 fourth and fifth combined. Covered with mealy white wax. 

 Male like female, only smaller. 



This is probably the most common species of Aleyrodidae in 

 Connecticut, and may be found in nearly every greenhouse. It 

 attacks outside plants in summer, but is probably carried over 

 winter indoors. It causes considerable injury and florists and 

 vegetable growers must spray or fumigate repeatedly and 

 thoroughly to hold the pest in check. 



Hosts: Over sixty greenhouse plants and outdoor vegetables 

 are attacked, but this insect shows a preference for Ageratum, 

 Lantana, Fuchsia, heliotrope, melon, cucumber, tomato and 

 tobacco. Occurs under glass throughout the state. 



New Haven, igoo, 14 Nov., 1902, 23 Nov., 1903, 5 Feb., 1905, 26 July, 

 1905, 27 Aug., 1909, July, 1914, 23 Aug., 1915; Bridgeport, 27 Aug., 1901, 

 Milford, 18 July, 1902, Saugatuck, 31 July, 1902, Pomfret, 21 Feb., 1903, 

 Terryville, 21 Oct., 1903, Hartford, 28 Feb., 1905, Norwich, 21 March, 1914. 



*T. waldeni (Britton). Aleyrodes zvaldeni. 



Ent. News, xviii, 339, 1907. 



Pupa case about .67 x. 40 mm., broadly oval, light greenish 

 yellow, vasiform orifice yellow and darker ; dorsum rather strongly 

 convex, segmentation evident, marginal area somewhat corrugated 

 or wrinkled, margin finely crenulate ; fringed with submarginal 

 row of down-curved glassy wax rods about 10 /x long; just inside 

 this fringe is a row of stouter, more or less curved wax rods, 

 mostly standing upright; other large rods are borne upon the 



