KELLICOTT. 47 



The abdominal appendages are yellow, brownish 

 above and at tips, about the length of 10. In profile 

 the superiors are securiform ; on the upper side curved 

 upwards, truncated obliquely from below upwards and 

 extended downwards at lower angle; from above the 

 outer side is nearly straight, the inner concave, end ob- 

 tuse with a projecting edge before the end on the inner 

 side, inside below there is a cushion-like process exceed- 

 ing the posterior edge making the same convex, this 

 process turns forward and ends in a free curved piece 

 resembling a half closed hand. The inferiors are slender 

 curved inwards, much shorter than the superiors. 



The female has the same colors as the male, although 

 the yellow is not so bright, the head is similar marked ; 

 the yellow areas and spots of the prothorax are larger ; 

 the thorax has a mid-dorsal black stripe, the humeral 

 suture is black with a brownish wash on each side but 

 no real humeral stripe, the femora have a dotted line 

 and a solid line of black, the tibiae have an interrupted 

 black line. Abdominal rings 1-9 are black dorsally 

 with the usual interrupted basal rings ; all of the 

 dorsum of 10 and the posterior margin of 9 are bluish. 



The conical appendages are dark and the valves 

 and processes light. 



PoUutum is exceedingly abundant along borders of 

 marshes, on shores of Lake Erie and the larger interior 

 lakes. 



IsCHNURA Charpentier. 



Three species of this genus occur in Eastern Amer- 

 ica, — ramhurii along the Atlantic coast, prognatha, 

 Virginia and verticalis everywhere. Only the last has 

 been detected in the state. These forms are small, 

 characterized by unlike pterostigma on the fore and 

 hind wings, that of the fore wings is darker than the 

 other but it reaches the costa, a fact which separates 

 the present genus from the next. 



