Biology of the INIembracidae of the Cayuga Lake Basix 245 



Thorax gray, deeply and densely punetafe; median percurrent brown line sharpened into 

 a ridge on extremity of horn and at apex of posterior process; sides of prothorax roughly and 

 irregularly carinate; horn porrect and greatly variable in length, cylindrical except at extreme 

 tip where it is flattened laterally; posterior process heavy, tectiform, gradually acute, almost 

 straight, very slightly decurved and extending just beyond apices of tegmina. 



Tegmina hyaline, apices fuscous, bases and costal regions lightly punctate; underwings 

 hj-aline, two-thirds as long as tegmina. Undersurface of body gray -brown, pubescent. 

 Legs uniform yellow-brown; femora thick and smooth; tibiae and tar.si densely pilose. 



Length 11 mm., including horn 14 mm.; width between humeral angles 5.5 mm. 



Male: Differs from female in size and markings. Smaller, body somewhat less robust; 

 porrect horn usually shorter and tending to curve; tegmina ecjualing apex of posterior 

 process. Color deep chocolat* brown; porrect horn almost black; apex of posterior process 

 becoming cinnamon brown; a wide, brilliant, lemon yellow longitudinal stripe on each side 

 of prothorax, extending from margin halfway to median dorsal line, also small patches of 

 \ellow on metopidium; head yellow with brown patches. Undersurface of abdomen darker 

 than in female. 



The genus Glitssonutns Butler 



The genus (Jlos.^ouotus is of doubtful staiuliiig, the characters being 

 based on the position and form of the pronotal crest, which is unfortunately 

 much inclined to vary. Theoretically this crest is tongue-shaped, erect, 

 and placed well forward. Of the five species that have been placed in 

 the genus, three have been found in tliis basin. They may be distinguished 

 as follows : 



a. Dorsum with white median vitta univittatus 



aa. Dorsum without vitta. 



b. Light brown with large pale markings crataegi 



bb. ^'ery dark brown without markings acuminatiis 



19. Glosstonotus (icu)in'n(dus Fabricius (Plate xx\i. 7) 



1781 Mcnibraci-^ acuminata Fabr., Spec. Ins. 2:317, no. (i. 



1787 Fabr., Mant. Ins. 2:263, no. 12. 



1788 Cicada acuminata Gmel., Ed. Syst. Xat. 2:2094. 



1792 Memhracis acuminata Oliv., Enc. M6th., p. 665, no. 21. 



1794 Fabr., Ent. Syst. 4:11, no. 13. 



1803 Centrotus acuminata Fabr., Syst. Rhyng., p. 18, no. 0. 



1842 Membracis acuminata Harris, Treatise, p. 179. 



1846 Thelia acuminata Fairm., Rev. Menib., p. 310, pi. 5, fig. 15. 



1851 Walk., List Horn. B. J\I., p. .564. 



1851 Walk., List Hom. B. M., p. 1142. 



1862 Hemiptycha acuminata Harris, Treatise, p. 221. 



1862 Thelia acuminata Uhler, Harris' Treatise, p. 221. 



1869 Telamona acuminalus Stal, Hem. Fab. 2:115. 



1877 Thelia acuminata Glover, Rept. U. S. Dept. Agr., p. 30, fig. 17. 



1877 Glossonotus acuminata Butler, Cist. Ent. 2:222. 



1878 Thelia himaculata Glover, MS. Journ. Horn., pi. 1, fig. 20. 

 1890 Thelia crataegi Smith, Ins. N. J., p. 441. 



1890 Thelia acuminata Van Duzee, Psyche 5:391. 



1891 Osborn, Iowa Acad. Sci. I-: 128. 



