148 ENTOMOLOGICAL NEWS. [September, 



tary, C. L. Marlatt; Treasurer, B. P. Mann; Executive Committee, E. A. 

 Schwarz, Otto H.eidemann, W. H. Fox. The President, Dr. Marx, de- 

 livered an address on " The Spiders of the District of Columbia," in which 

 he discussed at length the value of local lists as a means of forming a 

 comprehensive knowledge of the fauna of a country. He referred to the 

 somewhat scanty literature in this country of this nature as compared with 

 that of Europe, giving also a bibliography of the more important writings 

 on Araneae of both this country and Europe, and concluded with a list of 

 the spiders found to occur in the District. 



The address was discussed by Messrs. Riley, Fernow, Marx, Schwarz, 

 Smith, Dodge, Banks and others. 



The thanks of the Society was voted Dr. Marx for his address. 



February 5, 1891. Mr. Schwarz called attention to certain Micro-lepid- 

 optera which bred in the fruit of Sqlanuni carolinense, stating that he had 

 bred Gelechia beneficentella, and referred to the fact that no similar in- 

 sects were known to breed in the fruit of cultivated potato. 



Dr. Marx spoke of the spiders of the genus Pho/cus, of which nine spe- 

 cies occur in this country as against one or two found in Europe. He 

 exhibited specimens of the American species. 



Mr. Schwarz exhibited specimens of Casnonia ludoviciana found this 

 Winter in great abundance near Washington, D. C., and remarked on the 

 distribution and habits of this insect. 



Prof. Riley laid before the Society an interesting card which he had re- 

 cently received from Mr. McLachlan referring to the Plepharocerid larvae 

 mentioned at the previous meeting of the Society. Mr. McLachlan fully 

 confirmed Prof. Riley's reference of the larvae in question. 



Mr. Townsend read a paper on a remarkable new Hippoboscid received 

 from Dr. Alfredo Duges, Guanajuato, Mexico, which had been taken on 

 a bat. It was described as Trichobius n. gen. dugesii n. sp. 



Mr. Townsend also presented a paper on a Muscid, bred from swine 

 dung, which he described, in its larval and imago stages, as Cleigastra 

 sitisterei n. sp. This case of breeding had shown a larval hibernation, and 

 Mr. Townsend expressed the belief that in more northern latitudes most 

 coprophagus Diptera (Hcematobia, Lucilia, etc.) winter equally as larvae 

 or pupae, and only exceptionally as perfect flies. 



These papers were discussed by Messrs. Riley, Fox, Banks, Schwarz, 

 Marlatt and Townsend. 







C. L. MARLATT, Recording Secretary. 



ENTOMOLOGICAL NEWS for June was mailed May 29, iSyi. 



