98 ' NEUROPTERA OF NORTH AMERICA. 



line in the middle ; femora within and tibias without pale ; abdo- 

 men fusco-aeneous; margin of the tenth segment excised, beneath 

 bituberculated ; superior appendages short, obtuse, arcuated, infe- 

 rior ones broader, the apex sub-bifid ; or ( 9 ) fuscous, the apex of 

 the segments black, a blue(?) annulus at their base; no ventral 

 spine ; wings fuscous, pterostigma rhomboidal, fuscous ; sixteen 

 postcubital cross-nervules. 



Length 36 millim. Alar expanse 38 45 millim. 



Hob. Kentucky; Florida (Osten Sacken). 



Kirby, Fauna Bor. Amer. p. 252, describes Agrion puella Linn. 

 as having been taken in North America, lat. 65 ; perhaps it is 

 another species which is inextricable. The varieties captured, 

 which he describes, are : 



Var. B. Sea-green ; dorsum of the thorax black, with a green 

 stripe each side ; abdomen black, the base green, inscribed with 

 black ; feet black, beneath pale green ; the pterostigma black, en- 

 vironed with pale. (Certainly a female.) 



Var. C. Dorsum of the thorax black, each side with a whitish 

 stripe ; feet black ; pterostigma black. (From the description of 

 Kirby.) 



Tribe II. AESCHNINA. 



Wings unequal ; triangles of all the wings of the same form ; 

 genital organs of the male having the anterior hamule connate ; 

 the penis and vesicle conjoined ; genital organs of the female vagi- 

 nated or exposed. 



Sub-Fam. III. GOMPHINA. 



Eyes distant or sub-distant; head transverse; wings unequal, 

 the posterior ones broader ; the triangle short ; genital organs of 

 the female exposed. 



Division I. Labium entire. 



GOMPHUS LEACH. 

 Triangles of all the wings with no transverse veins. 



Subgenus Erpetogomplms SELTS. 



The abdomen blackish, with broad, hastiform, dorsal yellow 

 spots ; the feet short ; penis with no tooth beneath. 



