﻿300 POMONA COLLEGE JOURNAL OF ENTOMOLOGY 



Spinuics — There are two pairs of Ijreathing organs ; tlie first pair is 

 located on the ventral surface nearly midway between the prothoracic and the 

 mesothoracic cox?e ; the second is located nearer front than midway between 

 the mesothoracic and metathoracic coxae, on the ventral surface. 



Legs (Fig. 115 B). Normally long and hairy. Coxae longer than 

 broad, nearly as long as the femurs. Trochanters narrow and not more than 

 half as long as the coxae. Fenun-s stout, shorter than tibiae. Tibia long 

 and slender, twice as long as the tarsi, slender and spiny on the inner margin. 

 Tarsi with a few stout spines in inner margin. Claws normal. 



Pygidiuiii (Fig. 115 C and D). Covered over the surface with a large 

 number of circular pores, which are common to this genus. Anal lobes with 



1 large spine and 2 small, slender spines on the ventral surface, and with 



2 short stout spines and 1 hair-like spine on the dorsal surface, of each 

 lobe. Circumanal spines — normally six, which are half as long as the spines 

 of the anal lobes. On the ventral surface, just in front of these spines, 

 arc two i^airs of slender hair-like spines. .\ tlistinct ccniical cauda projects 

 backwards just below the 2 most dorsal of the spines. 



The i\i;,i;.f (Fig. 116) arc elliptical oval in shape. Color — Straw yellow, 

 amber, "corn" or light yellow. Surface — siuooth and somewhat glossy when 

 the covering threads arc removed. .S'/rf — .\verage length 0.34 mm., average 

 width 0.17 mm. Thev are deposited in large masses, and are intertwined and 

 bound together with fine, white, cottony threads, which are secreted and 

 cxuiled by the female during the process of egg-laying. The eggs are de- 

 posited in cracks, and crevices of the trees, on the fruit, especially where there 

 are clusters, in the navel of oranges and the blossom end of seedlings, under 

 the calyx, and in any other place which may afford slu-ltcr and ])r()tection 

 for theiu. 



Tinc M.\r.E. 



Lavvqc I Fig. 117 a). The first born are difficult to distinguish from 

 Ihe females of the same age, but the male larvae developes nnicli faster and is 

 soon told by its rather long, smooth, dark-colored body, and by llic dis- 

 appearance of the mouth parts after the first moult. There are 4 moults 

 before the adult stage is attained. The antenna^ are 7-articled and are sparsely 

 covered with hair. There are two dark- marginal eyes which are retained 

 throughout the entire development. 



Nxmpth (Fig. 117 b and c). When the brood is nearly one-tliird grown 

 the males seek a sheltered place, usually in an egg-mass, to s])in their cocoon 

 m which their transformation is to take ])lace. The cocoon varies from 3 

 III 4 mm. in length, is nearly cylindrical in sha]ie. and is spun with very fine 

 white cottony threads, such as cover the egg-masses. The n\iupli, if un- 

 disturbed, remains perfectly quiet throughout the moult, but if the cocoon 

 is destroyed at any stage, it immediately moves away to find a more suitable 

 place to make another. With age the body becomes dark in color, the wing 

 buds, and then the wing pads ap]iear and the large red dorsal and ventral 



