384: lllinola State Laboratory of Natural History. 



terior extremity and usually laterad of the meson. The 

 scale is extremely delicate, and semitransparent after 

 the male has emerged. The outline of the male pupa 

 can be plainly seen through the scale. The general form 

 of the male scale is shown at J, Fig. 1, Plate XXX. 

 £?/(/.§.— The eggs are pale yellow. 



Young. — The young larvae are long-oval, pale yellow, 

 the mouth parts prominent and doubled on themselves. 

 Antenuse prominent, little lighter in color than the body; 

 apparently five-iointed, the last two joints much longer 

 than the rest; the last joint with a long transparent hair 

 at its apex. The median pair of lobes conspicuous, with 

 two long delicate hairs projecting from their bases. 



Mature male. — The mature male (Plate XXX., Fig. 2, a) 

 is light yellow ; eyes dark purple, almost black ; anten- 

 nae yellowish and of the form shown at 5, Fig. 2; legs 

 and style light yellow; thoracic shield prominent, with 

 its margins and the band brownish ; wings prominent, 

 somewhat iridescent. Length about .62 mm.; style, 

 .22 mm. 



2latuTe female. — The body of the mature female (Plate 

 XXXI. , Fig. 1,) is rather flat, pale yellow, and of the 

 general shape shown in the illustration. The last seg- 

 ment is a little deeper ^^ellow than the rest of the body 

 and presents the following characters: 



There are four groups of spinnerets ; the anterior later- 

 al groups usually composed of six; the posterior later- 

 al, of four. There arv^ two pairs of well-developed lobes, 

 the second pair usually rounded, often as long and as 

 broad as the median pair; the median pair commonly 

 notched on the lateral margins near the tip. Plates 

 conspicuous and generally of the form shown in Fig. 2, 

 Plate XXXI. Between the first and second lobes they are 

 more or less toothed and project nearly to the end of 

 the first lobe; laterad of the second lobe there is a broad, 

 circular fringe: still further laterad and Ijetweeu the third 

 and fourth spines there are three large compound 



