Biology of the IVIembracidae of the Cayuga Lake Basin 237 



13. Acutalis tartnrea Say (Plate xxv, 20) 



1S31 Mcmhracis tartarea Say. Jourii. Acad. Xat. Sci. Phila. 5:242. 



1851 Ceresn tartarea Walk., List Honi. B. M., p. 1141. 



1859 Memhracis tartarea Say, Compl. Writ. 2:37G. 



1876 Acutalis tartarea Uiiler, List Hem. West Miss. River, p. 345.' 



1886 Ceresa semicrema Prov., Petite Faune Can. 3:235. 



1886 Memhracis tartarea Prov., Petite Faune Can. 3:236. 



1890 Acutalis tartarea Van Duzee, Psyche 5:389. 



1894 C.odg., Cat. Memb. N. A., p. 427. 



1908 Van Duzee, Stud. N. A. Memb., p. 51. 



1909 Smith, Ins. N. J., p. 91. 



1913 Funkh., Hom. Wing Veins, fig. 32. 



1913 Branch, Kans. Univ. Sci. Bui. 8: 102, figs. IS, 19, SO. 



1915 :\letcalf, Hom. No. Car., p. 5. 



1916 Van Duzee, Check List Hem., p. 59, no. 1602. 



Very rare. Only one record for the basin. This specimen collected 

 on July 20, 1886, by CI. ]Mc('ai<2;o, and now in the Cornell University 

 collection. 



Technical desci'iptioj}. — Small elongate species, \'erj- black, with eyes, undersurface of 

 body, and in some cases lateral margins of pronotum white, apices of tegmina abruptly 

 hyaline. ' 



Head twice as broad as long, densely black, smooth, not punctate nor pubescent; eyes 

 prominent and white; ocelli small, white, about equidistant from each other and from the 

 eyes; clypeus foreshortened, smooth, extending only slightly in a semicircular curve below 

 inferior line of face. 



Pronotum intensely black above, finely punctate, not pubescent, lateral margins and 

 tip of posterior process in some cases marked with white; dorsal crest low, weakly convex; 

 posterior process nearly straight, slightly decurved, more or less tectiform, extending beyond 

 abdomen and almo.st to end of apical cells of tegmina but not reaching apex of hyaline border. 



Tegmina opaque black for basal two-thirds, apical third suddenly hyaline; veins heavy 

 and black; wide apical border; basal third punctate. Undersurface of body pale. Legs 

 yellowish, tarsi fuscous. 



Length to apices of tegmina, 4.5 mm.; width between humeral angles, 2 mm. 



The genus Micrutali.s Fowler 



The genus Micrutalis is closel}^ related to Acutalis but is distinguished 

 by having four apical cells in the tegmina with the veins very obscure. 

 Both Acutalis and Micrutalis are common in the southeastern part of the 

 State, but few forms are found in the Cayuga Lake Basin. 



14. Micrutalis dorsalis Fitch (Plate xxv, 19) 



1851 Tragopa dorsalis Fitch, Cat. Ins. N. Y., p. 52. 



1851 Walk., List Hom. B. M., p. 1147. 



1856 Acutalis dorsalis Fitch, Rept. Ins. N. Y. 3:390. 



1850 Fitch, Trans. N. Y. Agr. Soc. 16:390. 



1869 Rathvon, Momb. Hist. Lane. Co. Pa., p. 551. 



