346 



THE CANADIAN ENTOMOLOGIST. 



In comparison, pudicus may be said to have a black abdomen 

 with yellow markings and cursim a yellow abdomen with black 

 markings. The wing picture of cursim is as irregular as that of 

 delicatulns and lighter coloured, while that of pudicus is dark and 

 well denned. 



THREE NEW SPECIES OF ODONATA.* 



BY HORTENSE BUTLER, ITHACA, N. Y. 



This paper contains the descriptions of three new species of 

 dragonflies which were found while working over the material in 

 the Cornell University collection, in the course of the preparation 

 of a handbook of North American dragonflies. 



Ophiogomphus sequoiarum, n. sp. 

 Total length d* , 49 mm. ; abdomen 34 mm. ; hind wing 29 mm. 



Total length 9 , 51 mm.; abdomen 34 mm.; 

 hind wing 29 mm. 



Face and occiput yellowish green, vertex 

 dark brown, with paler transverse oval 

 spot. Prothorax brown, with double 

 median yellow spot on dorsum. Thorax 

 olive green; on the dorsum a moderate 

 stripe of dark brown, contracted on the 

 collar; humeral and antehumeral stripes of 

 dark brown, confluent above, with a narrow 

 dividing line of olive green. Sides of 

 thorax olive green, with a very narrow 

 brown line on the last suture. Abdomen 

 brownish, with hastate yellowish spots on 

 dorsum of segments 1-9; dorsum of seg- 

 ment 10 more broadly yellow; sides of 

 segments 1 and 2 inferiorly yellow, in- 

 cluding the auricles; 8 and 9 also yellowish, 

 excepting extreme margin of 8 apically. 

 Legs dark brown, basal three-fourths of 

 femora yellowish and studded with short, 

 dark spines. Appendages yellowish (figs. 

 a and b) . Wings hyaline, costa indistinctly 

 paler, stigma black. 



a-d — Ophiogomphus 



sequoiarum. 

 e-f — Nehalennia carlotta. 

 g-j — Gomphus abditus. 



October, 1914, 



^Contribution from the Entomological Laboratory of Cornell University. 



