No. 34.] HEMIPTERA OF CONNECTICUT: MEMBRACIDAE. 205 



The life history has been worked out and described in detail 

 (Psyche xxii: pp. 183-198. 1915) and is confined entirely to the 

 one host. There should be three or four broods a year in 

 Connecticut. 



Host : Locust. 



Litchfield, June (L. B. W.) ; New Haven, 4 July, 3 Oct., 1020 

 (B. H. W.) ; Wilton, 24 June, 1920 (M. P. Z.). 



Entylia Germar. 



A genus containing a large number of species, the standing of 

 many of which is questionable. The distinguishing character of 

 the genus is the high flattened dorsum with a deep median notch 

 which separates it into two distinct crests. 

 E. bactriana Germar. (PL iv, 24.) 



1835. Entylia bactriana Germar. Silb. Rev., iii, 248. 



1851. Entylia indecisa Walker. List Horn. Brit. Mus., 549. 



185 1. Entylia reducta Walker. List Horn. Brit. Mus., 549. 



1858. Entylia impedita Walker. List Horn. Brit. Mus., 137. 



Very abundant. Van Duzee in his recent catalogue makes this 

 species a synonym of E. carinata Foerster, and this is perhaps 

 correct. However, while there is little doubt but that this common 

 northeastern form is the one described by Germar as recognized 

 by Fairmaire (Rev. Memb., 300. 4, pi. 5, fig. 32. 1846), by Stal 

 (Bid Memb. Kans., 241. 1869), and by Van Duzee himself (Stud. 

 N. A. Memb., 105. 1908), there is considerable doubt as to just 

 what form Foerster had before him (Nova Spec. Ins., Cent, i, 67. 

 1781). It seems more conservative, therefore, to retain Germar's 

 name at least until we are sure of the determination of E. carinata. 



The species shows so much variation in color and shape that 

 it is difficult to state which form is typical. Many differently 

 appearing individuals may be reared from one egg-mass. It is 

 usually found on various species of thistle on which the eggs are 

 laid in a double row on the undersurface of the leaf. Oviposition 

 begins about the first of July. The eggs hatch in about two weeks 

 and the nymphs reach maturity in a little over three weeks, the 

 instars averaging about five days each. The life history has been 

 described (Biol. Memb. Cayuga Lake Basin, p. 290. 191 7) as it 

 develops on the thistle but the insect shows some slight difference 

 in habits on other hosts. In some sections there are at least two 

 broods a year. This is one of the species of Membracidae which 

 winters over in the adult state occasionally in Connecticut. 



Hosts: Thistle, joe-pye weed, sunflower, red-bud, forked 

 panicum (P. dichotomiflorum) , goldenrod. 



New Canaan, 17 Sept., 1919 (B. H. W.) ; Litchfield, June to Sept. 

 (L. B. W.) ; Cornwall, 30 May, 23 June, 1920 (K. F. C.) ; Huntington, 

 9 July, 1920 (P. G.). 



