KELLICOTT. 71 



Group VII. 



Gotnphus notatus, Rarab. 



Dr Calvert states that Gotnphus notatus seems to 

 differ from plagiatus according to specimens in the 

 Museum of Comparative Zoology by its smaller size, 

 slightly concave occiput (slightly convex in plagiatus) 

 8th segment of the abdomen dark brown with a mid- 

 dorsal yellow triangular spot, (this segment pale 

 brown in plagiatus) and no well marked external ante- 

 apical angle on superior appendages as exists in 

 plagiatus. 



DROMOGOMPHUS, Selys. 



Two species of this genus have been taken in the 

 State ; spinosus is common in all parts, spoliatus is 

 abundant in the Maumee Valley. The species when 

 flying usually follow close to the banks of quiet 

 streams and canals, and are not so fond of rippling 

 water as are many species of the genus Gotnphus. 



The two species may be separated as follows : 



1. Abdominal segments 7—10 almost entirely yellow, the distal 

 part of hind femora black spoliatus. 



2. Abdominal segments 7-10 almost entirely black, hind femora all 

 black spinosus. 



Dromogomphus spinosus, Selys. 



Length : of abdomen c? 41 9 42, hind wing cT 35, 9 

 37. 



Male; colors black, brown, olive and yellow. Head; 

 occiput olive, regularly convex, ciliated ; front olive 

 with sutures margined with black ; vertex and man- 

 dibles black : Prothorax black, yellow dorsally ; mid- 

 dorsal carina olive, a fine band each side uniting above 

 and below with the antehumeral, a broad humeral 

 and an antehumeral united above and below, brown, 

 remainder of thorax olive ; legs and feet black, front 



