No. 34-] HEMIPTERA OF CONNECTICUT: MEMBRACIDAE. 20I 



and a dark cross band at the base and at the tip of the posterior 

 process. The tegmina are strongly clouded with brown at the 

 base. 



The complete life history is not known but the dates of appear- 

 ance, of copulation and of greatest abundance were noted in the 

 original description. 



Host: Qucrcus bicolor. 



New Haven, 17 July, 1920 (B. H. W.) ; Orange, 22 Tune, 1020 

 (B. H. W.) ; Portland, 26 July, 1920 (B. H. W.). 



Xantholobus Van Duzee. 



Originally set off as a subgenus by Van Duzee to include those 

 forms of the genus Cyrtolobus in which the posterior part of the 

 pronotum is strongly inflated to produce a rounded swelling. 

 Before this swelling the dorsum is constricted. 



Key to Species. 



Pronotum with three irregular oblique lines muticus 



Pronotum with single yellow line at lateral margin lateralis 



X. muticus (Fabricius). 



1776. Membracis mutica Fabricius. Gen. Ins. Mant., 297. 12. 13. 



1803. Centrotus mutica Fabricius. Syst. Rhyng., 21. 24. 



1824. Membracis trilineata Say. Narr. Long's Exp., 300. 2. 



1869. Cyrtosia mutica Stal. Hem. Fabr., ii. 25. i. 



1886. Cyrtosia trilineata Provancher. Petite Faune Can., iii. 239. 2. 



1894. Cyrtolobus muticus Coding. Cat. Memb. N. A., 431. 105. 



1904. Cyrtolobus trilineatus Wirtner, Ann. Carn. Mus., 3. 212. 



1908. Cyrtolobus {Xantholobus) trilineatus Van Duzee. Stud. Memb., 



1913. Xantholobus trilineatus Funkhouser. Hom. Wing. Veins., figs. 



45, 67. 

 1917. Cyrtolobus muticus Van Duzee. Cat. Hem., 549. 1695. 



Very common. A large well-marked species easily recognized 

 by the prominent swellings of the pronotum and the three irregular 

 yellowish fasciae. 



It is usually taken on red oak on which it shows the same general 

 habits as the species of the genus Cyrtolobus. The life history 

 has not been worked out but apparently it does not differ in any 

 important respects from other members of the group except that 

 it appears earlier in the Spring. Mr. Woodruff reports it as most 

 common on white oak in the locality of Litchfield. 



Hosts : Red oak, black oak, white oak. 



New Haven, 9 June, 1914 (M. P. Z.) ; 7 June, 1909 (B: H. W.) ; Wal- 

 lingford, 25 June, 1912 (D. J. C.) ; Killingly, 11 June, 1915 (W. E. B.) ; 

 Lyme, 16 June, 1918 (B. H. W.) ; Litchfield, June and July (L. B. W.). 



X. lateralis Van Duzee. 



1908. Cyrtolobus (Xantholobus) lateralis Van Duzee. Studies N. A. 

 Memb., 96. 



