272 W. D. FuNKHousEii 



dorsal crest elliptical, very slight sinus before base of posterior process, compressions not 

 deep; posterior process heavy, blunt, just reaching tips of tegmina. 



Tegmina hyaline or clouded with reddish yellow, tips pale, veins in some cases yellowish, 

 bases and costal areas irregularly punctate. Legs and undersurface of thorax flavous; 

 abdomen sordid yellow. 



Length 6 mm.; width 2.8 mm. 



43. Cyrtolohus tuberosus Fairmaire (Plate xxviii, 4) 



1846 Thelia tuberosus Fairm., Rev. Memb., p. 307, no. 6. 



1851 Walk., List Horn. B. M., p. 562. 



1894 Cyrtolohus tuberosus Godg., Cat. Menib. N. A., p. 433. 



1908 Van Duzee, Stud. N. A. Memb., p. 84, pi. 2, fig. 18. 



1915 Weiss, Ent. News 26: 102. 



1915 Metcalf, Horn. No. Car., p. 8. 



1916 Van Duzee, Check List Hem., p. 60, no. 1(573. 



Very common in the entire southern pari of the basin, a1)undant about 

 Danby and Spencer, and not uncommon about Ithaca. Has not, how- 

 ever, been taken in the basin north of Aurora. The species inhabits 

 the white and red oaks and is occasionally found on hickory. The life 

 history is fairly well known, but egg-laying has not been observed. 



Cyrtolohus tuberosus is the largest species of the genus and is recognizal)le 

 by this fact. The crest is high and the translucent spot which character- 

 izes the genus is very large. 



Technical description. — Largest species of the genus; brown mottled with darker brown; 

 dorsal compression strikingly transparent; dorsal crest situated well back on pronotum, 

 posterior process very short; tegmina smoky hyaline tipped with brown. 



Head triangular, broader than long, ochraceous tinged with red and punctate with brown, 

 not pubescent; base weakly sinuate; inferior margin of face strongly sinuate; eyes large, 

 brown; oceUi small, yellowish, slightly protruding, nearer to each other than to the eyes; 

 clypeus convex, brown hne on each side, tip extended and hairy. 



Pronotum deeply and closely punctate, light greenish brown; crest dark brown with pale 

 compression at anterior base, in the middle, and at posterior base; middle compression very 

 large and transparent, posterior half of crest dark brown with color extending in a dark 

 band to margin of pronotum; metopidium very convex, median carina prominent; humeral 

 angles prominent, rounded; posterior process short, sharp, brown, inferior lateral margin 

 slightly sinuate, not reaching tips of tegmina. 



Tegmina brownish hyaline, tips strongly marked with brown, bases punctate. Under- 

 surface of thorax yellow. Legs ferruginous, hind trochanters marked with brown; tarsi 

 flavous; claws brown. 



Length 9.5 mm.; width 4 mm. Male smaller than female, but similarly colored. 



44. Cyrtolohus discoidalis Emmons (Plate xxviii, 5) 



1854 Gargara discoidalis Emm., N. Y. Agr. Kept. 5:157, pi. 13, fig. 4. 



1864 Sniilia carinata Stal, Hem. Mex., p. 71. 



1867 Cjirtosia carinata Stal, Ofv. Kongl. Vet. Akad. Forh. 24:554. 



1S93 Ci/iiolobus discoidalis Godg., Can. Ent. 2S:172. 



1894 Atymrm discoidalis Godg., Cat. Memb. N. A., p. 436. 



