REPORT OF THE STATE ENTOMOLOGIST I913 189 



Lasiopteryx Westw. 



Lepidomyia Kieff. 

 Ledomyia Kieff. 



1840 Westwood, J. O. Introd. & Classif. of Ins., v. 2, suppl., p. 126 

 1864 Shiner, J. R. Fauna Austriaca Dipt., 2:410 (Diomyza Shin.) 



1876 Bergenstamm, J. E. & Low, Paul. Syn. Cecidomyidarum, p. 24 



1877 Karsch, F. A. F. Revis. der Gallmiicken, p. 14 

 1894 Kieffer, J. J. Wien. Ent. Zeit, 13:201 (Lepidomyia) 

 1895 Soc. Ent. Fr. Bui. 64, p. 320 (Ledomyia) 



1897 Syn. Cecid. Eur. & Alg., p. 55 (also Ledomyia) 



1900 Soc. Ent. Fr. Ann., 69:443 



1901 Soc. Hist. Nat. Metz. Bui., p. 17 



1904 Soc. Sci. Brux. Ann. 28, pt 2. Sep., p. 2-7 (Ledomyia) 



191 1 Felt, E. P. N. Y. Ent. Soc. Jour., 19:44 



This genus is easily recognized by the fuscous or subhyaline 

 wings, the membrane being more or less thickly scaled ; the third 

 vein well separated from the anterior margin and uniting with the 

 thickly scaled costa near the distal fourth. Tarsi quinquearticulate, 

 the first or metatarsus short ; claws unidentate. Antennal segments 

 cylindric, sessile in the female, those of the male with a distinct 

 stem ; circumfili present. Palpi quadriarticulate. Type L. obfus- 

 c a t a Meigen. Represented by five specimens in the British 

 Museum, one of which was placed in a balsam mount by the writer. 



A study of Westwood's type in the British Museum shows this 

 to be a valid genus though hardly referable to the Heteropezinae on 

 account of circumfili being present. Kieffer's Ledomyia, erected 

 with L. 1 u g e n s as the type, is in all probability a synonym of 

 this genus, though on examination of the antennae in water under 

 a cover glass, we were unable to detect circumfili. These latter 

 are easily demonstrated in other species which Kieffer has referred 

 to this genus. 



One American species referred to Lasiopteryx differs from 

 European forms studied, in the unusually stout and greatly de- 

 veloped circumfili. These organs in the male are irregular and 

 the longer loops extend to the tip of stems as long as the basal 

 enlargement of the antennal segment. Likewise, in the female the 

 circumfili extend to the tip of the shorter stem. This group exhibits 

 a relationship with the Lasiopterariae on account of the heavily 

 scaled costa, while the well separated third vein and the stemmed 

 antennae of the male indicate a close connection with the Dasy- 

 neurariae. Our best known form, L. c o r y 1 i Felt, was reared 

 from leaf folds of hazel, Corylus americana. It is interest- 

 ing to note that its ally, L. c a r p i n i Felt, was taken on ironwood, 



