BEUTENMULLER, MONOGRAPH OF THE SESIID^E. 271 



The insect has a decided preference for the peach, as no other plant is so often 

 and destructively attacked. The wild cherry is undoubtedly the native food-plant 

 of the species. 



Sanninoidea opalescens (Hy. Edw.). 



Plate XXX, Fig. 19, Male, and Fig. 20, Female. 



sEgeria opalescens Hy. Edwards, Papilio, Vol. I, 1881, p. 199 ; Grote, New Cheek List N. Am. 



Moths, 1882, p. 12 ; Beutenmuller, Bull. Am. Mus. Nat. Hist. Vol. IV, 1892, p. 174. 

 Sannina opalescens Beutenmuller, Bull. Am. Mus. Nat. Hist. Vol. VI, 1894, p. 366. 

 Sanninoidea opalescens Beutenmuller, Bull. Am. Mus. Nat. Hist. Vol. VIII, 1896, p. 126 ; ibid. Vol. 



IX, 1897, p. 219. 

 Sannina pacifica Riley, Insect Life, Vol. Ill, 1891, p. 393 ; Comstock, Man. Study Ins. 1895, p. 

 251 ; Cook, Rural Calif. 1895, p. 436 ; Woodworth, Rep. Agri. Exp. St. Calif. 1894-95 (1896) 

 P- 231. 

 Male. — Head, thorax, and abdomen entirely black. Legs black with white tufts. Fore wings 

 transparent with black margins. Transverse mark and outer margin very broad. Hind wings trans- 

 parent with black border. Underside of wings same as above. 



Female. — Head, thorax, abdomen, and legs wholly bronzy black. Fore wing opaque, bright 

 metallic green black. Hind wings transparent, opalescent, outer margin and fringes blue or green 

 black. Underside same as above. 



Expanse : Male, 25-30 mm ; female, 30-34 mm. 

 Habitat. — Nevada, California, Washington, Oregon. 



Types : Two males. Coll. Hy. Edwards, Am. Mus. Nat. Hist. Male and female, S. pacifica, 

 Coll. U. S. Nat. Mus. 



Allied to 61 exitiosa, but differs by having the transverse mark and outer 

 margins of the fore wings of the male much broader. In the female the fore 

 wings are opaque, the hind wings transparent and the abdomen wholly blue or 

 green black. The moths appear during the latter part of May and in June. In 

 the larval stage the species infests the lower parts of the trunk and roots of the 

 peach, cherry, and apricot and is very destructive to these trees. The habits of 

 this species are similar to those of 6 1 . exitiosa. 



Sanninoidea graefi {Hy. Edw.). 



Plate XXX, Fig. 21, Female, and Plate XXXIII, Fig. 5, Male. 



Sciapteron grcefi Hy. Edwards, Papilio, Vol. I, 1881, p. 183 ; Grote, New Check List N. Am. 



Moths, i88r, p. 11. 

 Parharmonia grcefi Beutenmuller, Bull. Am. Mus. Nat. Hist. Vol. VI, 1894, p. 89; ibid. Vol. 



VIII, 1896, p. 125. 



Male. — Head black, palpi yellow below, black above ; collar edged with yellow in front. An- 

 tennae blue black. Thorax blue black, with a very narrow yellow line on the patagia and one on 

 the posterior part of thorax. Abdomen blue black, with a narrow, pale yellow ring on each seg- 

 ment, anal tuft edged with white. Legs blue black with yellow tufts. Fore wings transparent, 

 opalescent, with narrow steel blue costal border and inner margins, the latter scaled with yellow ; 



