REPORT OF THE STATE ENTOMOLOGIST I913 93 



Rhabdophaga plicata Felt 



1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 352 



This species was reared from closely rolled leaves of willow 

 May 21, 1886, presumably by Mr Pergande. The same National 

 Museum note refers also to Lupinus arborca and there is 

 a bare possibility that the two plants may have been confused. 



Gall. The gall from which this insect was bred appears like 

 several closely rolled terminal leaves. 



Female. Length I mm. Antennae probably extending to the 

 second abdominal segment, sparsely haired, dark brown; 15 seg- 

 ments, the fifth with a length one-half greater than its diameter, 

 the terminal segment produced, with a length about three times its 

 diameter. Palpi ; first segment rather long, subquadrate, the second 

 broadly oval, the third more slender, one-half longer, the fourth 

 one-half longer than the third. Mesonotum dark brown, the sub- 

 median lines thickly haired. Scutellum yellowish brown, post- 

 scutellum darker. Abdomen reddish brown, sparsely haired. Wings 

 hyaline, costa reddish brown. Halteres yellowish transparent. Legs 

 a variable reddish brown, tarsi slightly darker ; claws very strongly 

 curved, the pulvilli about as long as the claws. Ovipositor about 

 one-half the length of the abdomen, the terminal lobes long, 

 slender, narrowly rounded. Type Cecid. 1037. 



Rhabdophaga aceris Shim. 



1868 iShimer, Henry. Amer. Ent. Soc. Trans., 1 1281-83 (Cecidomyia) 



1905 Washburn, F. L. Minn. Agric. Exp't Sta. Bui. 93, p. 65 (Ce- 

 cidomyia) 



1906 Felt, E. P. N. Y. State Mus. Mem. 8, 2:728 (Cecidomyia) 



191 1 Econ. Ent. Jour., 4:452 (Cecidomyia) 



1912 N. Y. Ent. Soc. Jour., 20:239-40 



The midge was reared by Doctor Shimer in midsummer from 

 pale or whitish larvae on the surface of white or silver maple 

 leaves, Acer saccharinum. Doctor Shimer states that this 

 species produces whitish cocoons upon the leaves, the midges emerg- 

 ing therefrom a week or two later. We have referred midges ^2344) 

 reared by J. S. Houser of the Agricultural Experiment Station, 

 Wooster, Ohio, August 9 and 26, 191 2 to this species, and, in order 

 to establish its identity more fully, published descriptions of both 

 sexes. This form is closely related to R. rileyana Felt, the 

 later being most easily distinguished by the long fourth palpal 

 segment, it having a length twice that of the third. A study of a 

 large series may show R. rileyana to be only a variety of 

 Shimer's species. 



