April, '07] ENTOMOLOGICAL NEWS. 1 23 



mesothorax occupy their proper places and are very little modi- 

 fied. The association of the names with sclerites is somewhat 

 doubtful in the metathorax, and the notes here given are to 

 induce observation. Dr. Sharp, in the Cambridge Natural 

 History, speaks of the opercula as enlargements of the mete- 

 pimera, and we have so designated them. 



In the structure of the female we merely show the ovipositors 

 of a few species — marginata, linnci and septendecim. The 

 differences between them are not great ; in marginata the basal 

 portions are proportionately much larger than in linnci, which 

 is taken as the type form, and the apical portions correspond- 

 ingly shorter; in septendecim the structure is much as in linnci, 

 but the entire organ is proportionately shorter. One of the 

 side pieces of the tip of the ovipositor of septendecim is figured, 

 highly magnified to show the hooks by which the splint is 

 pulled out from the slit made in the twig. 



Cicada pruinosa Say. 



Length — £, 33 mm., to tip of wing 49 mm.; $, 30 mm., to tip of 

 wing 48 mm. — Head black, anterior margin on each side of clypeus and 

 posterior margin between ocelli and compound eyes green; center of 

 upper portion of clypeus with an elliptical green spot. Pronotum 

 largely green, with two broad black marks beginning at anterior margin 

 and becoming attenuated posteriorly where they join, inclosing a green, 

 somewhat diamond-shaped spot; two other marks originate back of 

 eyes and curve posteriorly toward the center; posterior and lateral 

 margins wholly green. Mesonotum green, with black marks distributed 

 as follows : On each side of center, beginning at anterior margin, is a 

 broad mark which becomes slightly narrower and rounded posteriorly 

 and ends before middle; a second mark narrowly separated from the 

 first begins broadly at anterior margin, becomes greatly attenuated and 

 sometimes divides as it proceeds posteriorly, then broadens abruptly 

 and terminates just before the posterior margin; a third near the lateral 

 margin begins as before and joins the second mark posteriorly; in 

 center of posterior portion of mesonotum is a large mark, rounded pos- 

 teriorly and extending in a point between the two central marks of 

 the anterior portioi). Abdomen above black, base of first segment with 

 a white, heavily pruinose lateral dash, which encroaches to some extent 

 upon the second segment; a similar but longer and broader lateral dash 

 extends along the base of the third segment and a spot of the same 

 color is on each side of the eighth segment. In the female the dash 

 of the second segment differs from that of the male in not becoming 



