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PROCEEDINGS ENTOMOLOGICAL SOCIETY 



cap. Their color is usually whitish, sometimes a yellowish tint 

 prevails. The harlequin cabbage-bug shows its fancy garment 

 even on its eggs, which are decidedly ornamented in black 

 and white; and in species of the genus Podisus 1 the eggs glitter 

 in a metallic bronze color. A very interesting feature in the 

 study of these eggs is the chorial processes, which always are 

 present, and in this family they are placed in an upright po- 

 sition near the upper pole, where they are arranged around 

 the circular cap. 



On eggs of species of Brochymena these processes are 

 microscopic in size; they stand singly, somewhat remote from 

 each other, in number of about 30 to 40; the outer surface of 

 the shell is strongly punctured in irregular rows( PI. IX, fig. 3.) 



In eggs of Euschistus the surface of thechorion is delicately 

 punctuate; the processes are larger, abruptly thickened at the 

 upper end, with a small opening; they number a c least 60 or 

 more (PI. IX, fig. 4). 



Eggs of Tkyanta cnstator have the outer surface covered 

 with minute, whitish, short bristles and the processes are less 

 densely placed (PI. IX, fig. 1). 



The most characteristic shape of the chorial processes is ex- 

 hibited on the eggs of the Podisus group and allied forms; 

 they can even be observed by the naked eye and are about 

 1 mm. in length They are a little swollen at the base, then 

 suddenly bent backward from the chorion, and taper gradu- 

 ally to the end; the tip is funnel-shaped. 



Eggs of Cosmopepla carnijex are sim- 

 ilarly formed, with the exception that the 

 color is not of a deep bronze as in Pod- 

 isus and the outer surface of the chorion 

 less thorny in appearance (PI. IX, fig. 2). 



A striking feature in the hatched eggs 

 of species of the family Pentatomidse is 

 the uniform presence of a little T-shaped 

 instrument within the orifice. This has 

 been left behind by the young larva; it 

 seems to be attached dorsally at the pro- 

 notum to a delicate membrane which 

 envelopes the young larva before its 

 emergence from the egg (fig. 2). It is composed of a more 

 or less convexly formed, transverse bar with a strong median 

 spur, made of thickened layers of chitin and usually dark 

 brown; the two points of the bar are connected with the 



1 C. V. Riley, 4 Ann. Report Ins. of Missouri, p. 20. A. H. Kirkland, 

 Report of the Gypsy Moth Committee, Mass., 1896, p. 52. 



FIG. 2. 



