ii6 



ECONOMIC ENTOMOLOGY 



winged form in which they project beyond the tip of the tegmina. * The 

 tegmina are deep black to grayish brown, in the male reaching the tip 

 of the abdomen, in the short-winged female not quite so long and in 

 the long-winged form slightly surpassing the tip of the abdomen. The 

 ovipositor never exceeds the body in length. Length of insect 16-20 

 mm. (Fig. 71). 



Eggs. — ^ Yellow, cylindrical, laid in the soil in late summer and 

 autumn in Quebec, in June and July farther south. 



Nymphs. — In the north the nymphs hatch 

 in early summer from hibernated eggs; in the 

 neighborhood of Indiana they hatch in July 

 and August and hibernate. 



Snowy Tree Cricket {(Ecanthus niveus 

 DeG.). — Sometimes injures apple and plum 

 trees by egg-punctures, and occasionally eats 

 holes in the ripe fruit (Fig. 74). 



Adult. — Ivory-white tinged with green, 3^^ 

 inch long; wing-covers nearly twice as long as 

 abdomen; those of male flattened, crossed by 

 oblique veins, semi-transparent and broader 

 than body, those of female wrapped close 

 about the body; ovipositor short, straight and 

 tipped with black; maxillary palpi relatively 

 long. July-October. 



Eggs. — Elongate, cylindrical, yellow, 3^^ 

 ^'''^^'^^A~^'TfT^T' inch long; laid singly in punctures in the bark 



vania field cricket (Gyllus ° ' ® -' ^ 



pennsyivanicus) . (After of Smaller branches of apple, plum and peach, 

 ^''sger.) jj^ ^j^g f^l^. hat(,i^ jn May and June. 



Nymphs. — Feed on plant-lice and other insects. 



Black-horned Tree Cricket {(Ecanthus nigricornis Walker). — Con- 

 sult Bull. 388, N. Y. Ag. Exp. St.) Injures blackberry and raspberry 

 canes by egg punctures, and carries spores of cane-blight and other 

 diseases (Figs. 72 and 73). 



Adult. — Greenish white; head and pronotum black or barred with 

 black; body black beneath and yellowish-green above; antennae long, 

 mostly black; wing-covers as in (E. niveus; head, thorax and legs mostly 

 black. Probably feeds on flies. 



Eggs. — Similar to those of (E. niveus; laid in a row of punctures 



