525 



of the fourth, fifth, and sixth terga are mostly pale yellow; anal ap- 

 pendages (Fig. 195) black, the superiors much longer than the in- 

 feriors and with a ventral basal tubercle, the apices blunt and directed 

 ventrad; inferiors conical, sharply pointed, and directed obliquely 

 dorsad. 



Female. — Color similar to that of the male. 



Head similar to that of the male except that the postocular spots 

 are not connected with the blue of the caudal portion of the occiput. 



Thorax similar to that of the male ; mesostigmal plates black. 



Abdomen (Fig. 95) with terga 1-6 as in the male, seven with 

 dorsal stripe reduced to a mesal line on the basal three-fourths, sud- 

 denly widened at the apex; eighth tergum black, with a pair of pale 

 basal spots connecting with the pale lateral margins ; dorsum of nine 

 and ten black, the lateral surfaces pale ; ovipositor short, the prostyles 

 blunt and dark, the ventral margins of the lateral valves serrate. 



Measurements 



Length, $ 27-32 mm. 



Length, 9 34 mm. 



Length of abdomen, $ 22-25 mm. 



Length of abdomen, 9 26 mm. 



Length of hind wings, S 16-18 mm. 



Length of hind wings, 9 20 mm. 



Width of hind wings, S 3-3.7 mm. 



Width of hind wings, 9 4 mm. 



Described from a specimen taken at Lexington, Ky., August, 

 1915, and a number of both sexes in the collection of E. B. WilHamson. 

 Reported from Illinois. 



Enallagma calverti Morse 



Nymph. — Color, buff. 



Head subelliptical, the caudo-lateral margins projecting a little 

 caudad and with a few setae ; antennae of the usual form, the third 

 segment longest, the second longer than the first ; labium extending 

 caudad to the second pair of coxae ; mental setae four, lateral setae six, 

 and the marginal setae on the margin of the median lobe five or six. 



Thorax : legs with rows of heavy setae, especially prominent on 

 the femora, which have several rows and a group of longer setae near 

 the apices; tibiae with two ventral rows of long setae, and a thick bunch 

 of scales at the apices ; tarsi of the usual form and with thick ventral 



