OF ARTS AND SCIENCES. 3 1 



ish yellow, brown and black. Its range' is from Quebec to the 

 District of Columbia, but it appears to be rare. Calvert's legend 

 reads: " One male flew in shop at Sixth and Chestnut Sts. Phila. 

 May 28, 1891." One female in collection. Length, 45 ; alalr 

 expanse, 57. 



4. Gomphus naevius Hagen. 



Calvert, p. 242. 



This, the smallest of our Gomphines, appears to be rare, and is 

 especially noticeable for its whitish abdominal appendages and 

 very short vulvar-lamina — scarcely one-fifth as long as the ninth 

 segment ; the apical half is bilobed and the tips rounded. One 

 female. Length, 39 ; alar expanse, 45. 



3. Dromogoinplius Selys. 

 Calvert, p. 222. 



5. Dromogoinplius spinosus Selys. 



Calvert, p. 245. G. spinosus, Hagen, Syn. Neur. N. A. p. 102. 



This vigorous representative of the Gomphine type, originally 

 placed by Baron Selys-Longchamp in the genus Gomphus, and 

 later, by the same eminent authority, given a place in his new 

 genus, Dromogomphus, distinguished by its long third femora 

 and the 5-7 long spines in the antero-inferior row, is more abund- 

 ant about Lake Winnipisauke than it is around Manchester, 

 where it is, however, occasionally to be met with. Length, 54- 

 61 ; alar expanse, 76-80. 



II. Sub-Family Aesclininse. 



4. Aeschna Fabricius. 

 Calvert, p. 222 ; Hagen, Syn. Neur. N. A. p. 119. 



6. Aeschna verticalis Hagen. 



Calvert, p. 248 ; Hagen, Syn. Neur. N. A. p. 122. 



This strong-flying " mosquito-hawk " is easily recognized by its 



