26 Bulletin 1, Biological Society of Wdstliiiigton, 1918. 



ture. Among entomologists of this period, those paying most 

 attention to the study of local insects were Henry Ulke, E. A. 

 Schwarz, W. H. Ashmead, Theo. Pergande, and D. W. 

 Coquillett. The latter described more than 40 new species 

 of flies from the region; Mr. Ashmead described more than 

 240 species of Hymenoptera ; while Mr, Ulke. with the assist- 

 ance of Mr. Schwarz, issued the first list of beetles of the 

 District including almost 3,000 species. The active workers 

 of later years may be learned from the bibliographies below. 

 The region of the District of Columbia is a rich collecting 

 ground for entomologists, as numbers of visiting specialists 

 have testified. Not only is there a great variety of ecologic 

 conditions, but unspoiled places are easily reached in almost 

 any direction. The development of such an enormous field 

 as the whole group of insects, even for a limited area neces- 

 sarily is slow. What has been accomplished in the various 

 groups is indicated by the citation of the principal results 

 in the following bibliographies. 



BIBLIOGRAPHY. 



GENERAL. 



Banks, Nathan. 



At the Ceanothus in Virginia. 

 Ent. News XXIII, No. 3, March, 1912, pp. 102-110. 

 42 species of Hemiptera, 

 58 species of Coleoptera, 

 165 species of Hymenoptera, and 



117 species of Diptera, recorded from Falls Church and 

 vicinity. 



NEUBOPTEBA. 



Banks, Nathan. 



A list of Neuropteroid insects, exclusive of Odonata, from the 

 vicinity of Washington, D. C. 



Proc. Ent. Soc. Wash., 6, No. 4, October, 1904, pp. 201-216, pi. II. 



In all 174 species are recorded distributed as follows: Archiptera. 

 73; Neuroptera, 47; Trichoptera, 54. 



Descriptions of New Nearctic Neuropteroid Insects. 

 Trans. Am. Ent. Soc, 32, pp. 1-20, pis. MI, Nov., 1905. 

 5 new species from the vicinity of District of Columbia. 



