Sept., i9i6.] Felt: New Western Gall Midges. 175 



his opinion. He replied in part that it "' represents a type which I 

 do not know from Europe or palearctic countries, but it has much 

 the same features characteristic for several South American species," 

 and also states that he had thought of making a new subgenus on the 

 characters involved. This seems inadvisable for me to attempt on 

 the basis of the single species represented among my material, so, for 

 the present, it seems best to accept the genus Sarcophaga as a useful 

 dumping ground. The more important characters which harmonize 

 least with Sarcophaga are the vestiture of the back of the head, the 

 broad front in the male, the stout nature of the chsetotaxy through- 

 out, the shape and vestiture of the abdomen in the male, and the 

 genital segments and genitalia. There are other characters which 

 would assume importance if they were duplicated in related forms. 



NEW WESTERN GALL MIDGES. 



By E. p. Felt, 

 Albany, N. Y. 



The following accounts of species are based largely on material 

 collected and reared by Mr. P. H. Timberlake, of the U. S. Bureau 

 of Entomology, while in Colorado and California, the observations 

 on habits and life history notes being made by him. It will be noted 

 that his work has disclosed the presence of a number of gall midges 

 upon various composites, indicating the prevalence of somewhat the 

 same conditions as are to be found upon related plants in the eastern 

 states. The rearing of several species of Diarthronomyia is par- 

 ticularly interesting in connection with the recent discovery of the 

 chrysanthemum midge, D. Jiypogcca H. Lw. in this country. There 

 are included in this lot of descriptions two accounts of species of 

 Lasioptera infesting the leaf sheaths or the lower portion of the stem 

 of two grasses, new records due to the investigations of Mr. C. N. 

 Ainslie, also of the U. S. Bureau of Entomology. 



ONODIPLOSIS new genus 

 This form, on account of the greatly reduced palpi, the somewhat 

 produced mesonotum and the modified ovipositor, is allied to the 



