56 Bulletin No. 159 



dusky. The caudal setae are of a decided yellow. Beneath, 

 pale yellow, the posterior edges of the abdominal somites 

 dusky, the posterior ones more completely so. Length 

 10 mm. Cumberland River, Straight Creek, Benson Creek, 

 and brooks about Lexington. 



Ephemeride Larva No. 2. — This larva is figured in this 

 bulletin (Fig. 46). It is less common than No. 1, but bears 

 a close general resemblance. 



The abdominal segments are not toothed. The caudal 

 setse are only very slightly setose and are distinctly banded 

 with white and black. Length 9.5 mm. Cumberland River 

 and Straight Creek. 



Ephemeride Larva No. 3. (Chirotenetes sp.) — One of the 

 most striking insect larvae collected is of a deep umber- 

 brown color, with a pale stripe along the back, the legs 

 sharply banded with black and white. Head small and not 

 flat. Thorax strongly convex and not expanded. Tibiae of 

 anterior legs with strong spines and a double fringe of long 

 hairs. Wing-pads black. Gill-plates alongside of abdomen 

 turned outward, each with a large purple central area. 

 Abdomen marked with black at the edges of segments, two 

 at the posterior extremity with the lateral angles produced 

 into a sharp spine. Central caudal seta shorter than the 

 others, heavily fringed along the sides, the extreme base 

 black, then more than half the length a deep yellow, then a 

 band of black, the distal portion white. Lateral setae 

 heavily fringed within, marked like the median seta, but 

 with a slender black terminal unfringed region beyond the 

 white. Length 12.3 mm. Cumberland River, Left Fork of 

 Straight Creek, Benson Creek. 



An adult of this insect was collected October 21, 1911, 

 at the edge of Cumberland River at Pineville. Its body 

 resembles somewhat closely in form, general structure, and 

 even color, that of the young. The second and third pairs 

 of legs are pure white. The wings are smoky, the veins 

 black. Two slender caudal setae are pallid. I take this to 

 be Chirotenetes albomanicatus, described by Professor Need- 

 ham, who says of the larva, that it feeds upon the larvae of 



