72 DRAGONNLIES OF OHIO. 



tibiae vittate with olive beneath. Abdomen; dorsal 

 band present on all the segments, sides of 1-2 and base 

 of 3 olive, sides of 7-10 more or less marked with 

 yellow, superior appendages black, from above wedge- 

 shaped, acuminate at tip; from side view, tips slightly 

 elevated, inferior appendages from above slightly 

 more spreading than the superiors, gradually curved, 

 from side view four fifths as long as the superiors, 

 gradually curved, apex blunt. 



The female differs in the stouter form of the ab- 

 domen, in the occiput being concave in the middle 

 where it bears an angular tooth, and in the numerals 

 and antehumerals being separated above. 



The vulvar lamina is about a third as long as 9, 

 triangular in general outline and divided at the apex 

 with the two parts divaricate, pointed. 



The species is distributed all over the State. 



The female has been observed often ovipositing in 

 a manner similar to Maccrotnia illinoisensis, that is by 

 skimming the water and every few feet or rods touch- 

 ing it with the abdominal tip, scarcely check- 

 ing her speed ; at other times I have seen them drop 

 down from an overhanging tree and repeatedly tap the 

 water, remaining in one place after the manner of 

 Libellula. Pairs were noticed to fly up into tree tops 

 and remain in union for a considerable time. 



Drotnogomphns spoliatus, Selys, 



Length of abdomen c? 45, 9 47, hind wing cT 36, 

 9 39. 



Male; colors brown, yellow and black. Head; 

 occiput yellow, convex, ciliated with light colored hair, 

 face yellow, vertex brown; prothorax yellow irreg- 

 ularly marked with brown, mid-dorsal carina yellow, 

 margined each side with brown which gradually 

 widens anteriorly, humeral and antehumeral bands 

 present, separated ; first and second lateral sutures and 



