2l6 NEW YORK STATE MUSEUM 



Phytophaga celtiphyllia Felt 

 1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 371 (Mayetiola) 



The reddish brown species described below was reared in May 

 1900 from obconic leaf galls on leaves of hackberry, Celtis, taken by 

 Mr J. M. Shaffer at Keokuk, Iowa, and sent to the Division of 

 Entomology, United States Department of Agriculture. Apparently 

 the same form was reared by Mr Pergande from similar galls on 

 young twigs of hackberry collected by E. A. Schwarz at Corpus 

 Christi, Texas, in 1895. 



Gall. Very hard, obconic, the upper extremity produced as 

 a long, slender nipple; at the base five or six low ridges. The galls 

 are smooth inside and divided by a delicate though dense web into 

 two compartments, the larva occurring in the lower. The galls 

 occur on the upper side of the leaf and drop when mature. (Notes 

 by Pergande) 



Larva. Pale yellowish, with a brown breastbone. (Notes by 

 Pergande) 



Male. Length 3 mm. Antennae nearly as long as the body, 

 sparsely haired, light brown; 22 to 23 segments, the fifth with a 

 stem as long as the basal enlargement, which latter has a length 

 twice its diameter; terminal segment reduced, tapering, obtuse. 

 Palpi; first segment short, stout, irregular, the second rather stout, 

 with a length twice its diameter, the third a little longer and stouter, 

 the fourth apparently missing. Mesonotum shining dark brown, 

 the submedian lines thickly clothed with fulvous hairs. Scutellum 

 yellowish brown, sparsely setose apically, postscutellum fuscous 

 yellowish. Abdomen reddish brown. Wings hyaline, costa light 

 brown, the third vein at the apex. Halteres yellowish basally, 

 reddish brown apically. Legs a variable reddish brown, the seg- 

 ments darker apically; claws long, slender, evenly curved, the pulvilli 

 a little shorter. Genitalia ; basal clasp segment long, stout ; terminal 

 clasp segment long, swollen near the middle; dorsal plate long, 

 broad, broadly and triangularly incised; ventral plate short, broad, 

 deeply and roundly incised. Harpes short, stout, obliquely trun- 

 cate. 



Female. Length 3.5 mm. Antennae extending to the fifth 

 abdominal segment, sparsely haired, reddish brown; 24 segments, 

 the fifth cylindric, with a length two and one-half times its diameter; 

 terminal segment produced, broadly rounded. Palpi; first seg- 

 ment short, stout, irregularly oval, the second one-half longer, 

 stout, the third twice the length of the second, more slender, the 

 fourth one-fourth longer than the third, somewhat dilated. Ovi- 

 positor probably as long as the body, the terminal lobes slender, 

 with a length about four times the diameter, tapering, narrowly 

 rounded. Other characters practically as in the male. Type 

 Cecid. 913. 



