50 



CLASSIFICATION OF THE ALEYRODIDiE. 



found and carefully studied. It is flattened, of short, oval form, 1.02 mm. long 

 and 0,84 mm. wide. The legs are plain and are short, stout, and apparently 

 three-jointed. The basal joint is very stout, nearly as broad as long; the 

 second joint is slender, about twice as long as broad; the third joint is very 

 short, and bears a single, stout, curved hook. The rostrum is distinct, one 

 jointed, and three filaments protrude. Each abdominal segment bears laterally 

 a large, complicated pore, from which protrudes a glassy filament, short in this 

 stage, but very long in the following. A smaller pore is situated just laterad of 

 the base of the antenna and those on the anal and pre-anal segments are smaller 

 than those on the others. Antennae six-jointed. Joint 1 short, stout ; joints 

 2 and 3 long, sub-equal in length, and each five times as long as 1 ; joint 4 

 one-half as long as 2 or 3; joint 5 one-half as long as 4, sharply pointed at tip. 

 Dorso-anul pore large, distinct; protrusile organ conical in shape, supported by 

 a tri-lobed chitiuous framework. Entire dorsal surface of body finely granu- 

 late, the ventral surface granulate laterally to the large pores. Each ventral- 

 abdominal segment bears a transverse row of eight small secretory pores, each 

 of which seems to be tri-cellular. 



Adult larva (fig. 40) [fig. 9]. — Closely resembles the preceding, except that 

 it is much more convex, and has very long glassy filaments and an abundant 



Fig. 8. — Aleiirodlcns cocois: a. Egg ; h, first larva ; c, leg of same ; dj intermediate larva, 

 dorsal view ; c, protrusile organ of same ; /, secretory pore of same ; g, intermediate 

 larva, ventral view; h, margin of body of same. (From Riley and Howard.) 



secretion of white wax. Abdominal segments very distinct, ai'ched anterodor- 

 sally, with a medium longitudinal ridge. The skin of this larva sjilits 

 transverso-dorsally along the hinder edge of the thorax, and from the middle 

 of this slit medially and longitudinally to the cephalic end of the body. From 

 this double slit the pupa presumably emerges. 



Ailult female (fig. 39, o) [fig, 7, a]. — Length. 2.1 mm. ; expanse, 4.1 mm. Color 

 dull honey-yellow; eyes darker; abdomen, when swollen with eggs, much lighter 

 and bordered with abundant waxy secretions. Antennte six- jointed. Basal 

 joint short, stout; joint 2 (scape) twice as long, equal to it in width; fiagellum 

 rugoso-annulate ; joint 3 longest, more than twice as long as 1 and 2 together, 

 and equal in length to 4, 5, and G together. In dried specimens it becomes espe- 

 cially constricted at two points; joint 4 rather more than half as long as 3 : joint 

 5 less than half as long as 4 ; join 6 equal in length to 5. Joint G with a bristle 

 at tip, the other joints with sparse, short bristles. Head conical when seen 

 from above, the rostrum plainly 2-jointed, but perhaps with a basal joint; the 

 apical joint acute, nearly as long as the preceding joint. Eyes pyriform, large. 



