196 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



gray mottled with brown and banded with green. The pronotum 

 is low and regularly arcuate, the metopidium convex, the posterior 

 process short and sharp, and the tegmina wrinkled hyaline with the 

 apices brown. 



The life history is not known. 



Hosts : White oak, red oak. 



Litchfield, July and Aug. (L. B. W.) ; New Haven, 20 June, 4, 7 July, 

 1920 (B. H. W.) ; 18 June, 1920 (M. P. Z.) ; Orange, 22 June, 1920 

 (B. H. W.). 



C. inermis ( Emmons ) . 



1854. Gargara inermis Emmons. Agr. N, Y., v, 167, pi. 13, fig. 9. 

 1894. Atymna inermis Coding. Cat. Memb. N. A., 436. 127. 



1908. Cyrtolohus inermis Van Duzee. Stud. N. A. Memb., 90. 15. 

 Not common. An interesting little species of which the males 



are small and strikingly marked with black and white, and the 

 females are larger and are uniformly greenish yellow. 



The life history and hosts are not known. 



New Haven, 9 Jime, 19 14 (Q. S. L.). 



C. vau (Say). (PI. iv, 22.) 



1831. Memhracis vau Say. Jour. Acad, Nat. Sci. Phila., v, 299. 



1851. Thelia semifascia Walker. List Hom. Brit. Mus., 561. 



1851. Smilia vau Fitch. Cat. Ins. N. Y., 48. 



1851. Thelia vau Walker. List Hom. Brit. Mus., 1141. 



1886. Cyrtosia vau Provancher. Petite Faune Can., iii, 238. 



1893. Cyrtolohus nigra Coding. Can. Ent., xxv, 172. 



1893. Cyrtolohus punctifrontis Coding. Can. Ent., xxv, 172. 



1893. Cyrtolohus tricincta Coding. Can. Ent, xxv, 172. 



1893. Cyrtolohus van Coding. Can. Ent, xxv, 172. 



1903. Thelia fasciata Buckton. Mon. Memb., 189. 



1903. Argante semifasciata Buckton. Mon. Memb., 189. PI. 40, fig. 9; 

 pi. 41, figs. I, la. 



1909. Cyrtolohus varius Smith. Insects New Jersey, 92. 



Very abundant. Probably the commonest species of Cyrtolohus 

 in the State. The species shows, however, such a wide variation 

 in size and coloration that it has been described under a number 

 of synonyms and is often confused with other species in collections. 



The typical form is small and very characteristically marked, with 

 the compressed spot round and transparent, a pale brown transverse 

 pronotal band bordered with deep brown, very conspicuous, and 

 a prominent band of the same color before the apex, these two 

 bands approaching near the lateral margin of the pronotum to 

 form a "V" which doubtless suggested the specific name. The 

 pronotum is low, closely and roughly punctate, the dorsal crest 

 has only a faint sinus before the posterior process, the posterior 

 process is short, blunt and tectiform, reaching only to the bases 

 of the apical cells of the tegmina which are hyaline with the tips 

 faintly clouded. 



The life history has been worked out on white oak but the 

 insect is found also on several other species of Quercus. The 

 entire life history is usually passed on one host, the eggs being 



