Biology of the Membra cidae of the Cayuga Lake Basin 289 



The genus Entylia Germar 



To the genus Entylia a very large number of species have been assigned, 

 the standing of many of which is questionable. The genus is distinguished 

 by the high, flattened dorsum with the deep median notch. One species 

 is represented in the basin, but this species shows so much variation that 

 it has been recorded under a number of names. 



The whole genus is indeed in much confusion. Matausch (1910 c) 

 has claimed that most of the species assigned to the genus, together with 

 the species of the genus Publilia, are synonymous. Recent experiments 

 b}^ the writer, which will form the subject of a later report, tend to show 

 that this is not entirel}^ the case but that undoubtedly many of the species 

 are not valid. The species E. hactriana as here recognized is, however, 

 believed to be good. 



60. Entylia hactriana Germar (Plate xxix, 11, 12) 



1835 Entylia hactriana Germ., Silb. Rev. 3:248. 



1846 Fairm., Rev. Memb., p. 300, no. 4, pi. 5, fig. 32. 



1851 Walk., List Horn. B. M., p. 547. 



1851 Entylia indecisa Wall.., List Horn. B. M., p. 549. 



1851 Entylia reducta Walk., List Horn. B. M., p. 549. 



1858 Entylia. impedita Walk., List Horn. B. M. Suppl., p. 137. 



1869 Entylia hactriana Stal, Bid. Memb. Kan., p. 241. 



1877 Butler, Cist. Ent. 2:211, no. 2. 



1877 Entylia reducta Butler, Cist. Ent. 2:211, no. 5. 



1894 Entylia hactriana Godg., Cat. IVlemb. N. A., p. 397. 



1903 Entylia reducta Buckt., Mon. IVlemb., p. 185. 



1903 Entylia hactriana Buckt., Mon. Memb., p. 185. 



1908 Entylia reducta Van Duzee, Stud. N. A. Memb., p. 105. 



1908 Entylia hactriana Van Duzee, Stud. N. A. Memb., p. 105. 



1909 Smith, Ins. N. J., p. 93. 



1913 Funkh., Hom. Wing Veins, fig. 48. 



1915 Metcalf, Horn. No. Car., p. 9. 



1916 Entylia carinata Van Duzee, Check List Hem., p. 61, no. 1716. 



\'ery abundant in the lower parts of the basin, on thistle. Appears in 

 July and August in such large numbers that it is often possible to take 

 several hundred specimens from one plant. Nymphs and adults may 

 be taken thi-uout the summer and the life history may be easily studied. 



The species shows so much variation in color and in the shape of the 

 pronotmn that it is hard to choose the typical form. At least four forms 

 that have been descril)ed as distinct species have been reared by the 

 author from one egg mass. 



