REPORT OF THE STATE ENTOMOLOGIST I907 I9I 



the female has the second joint about equal to the third in length, 

 and longer than the fourth which in turn about equals the fifth, 

 and is about Ys oi the length of the second. The basal joint 

 (fused with the tibia) is about j4 as long as the second joint; 

 tarsus and tibia are about equal length. The foretarsus of the 

 male is longer than the tibia, and its third joint is longer than the 

 second wdiich about equals the fourth, and is twice the length of 

 the fifth. 



The wings are wholly hyaline (dull hyaline in the subimago) 

 with weak cross veins. There are no accessory sectors in the 

 median fork, but there are two behind the bisector of the cubital 

 fork and the vein Cuo is more or less detached. 



Nymph. Length, 7 mm, with setae 4 mm ; antennae, 2 mm. 

 This nymph is less depressed in form than others of the genus. 

 Its colors are bronzy green and brownish, paler below and on all 

 appendages, and sprinkled all over the dorsum with very fine pale 

 dots or granulations. There is a pale line across the top of the 

 head in front, and there is a pale dot on each of the fore angles 

 of the prothorax, and another between the inner basal angles of 

 the wing cases ; antennae, pale, except the basal segment. 



The body is widest on the mesothorax ; the abdomen about as 

 long as head and thorax together ; the prothorax is wider than the 

 head. Its sides are incurved anteriorly where they end in obtuse 

 angles that project forward behind the eyes ; the fore femur is much 

 stouter than are the other femora, and darker in color externally ; all 

 the claws are strongly curved, and each is armed beneath with a 

 comb of eight or nine pointed teeth. The abdomen is depressed, 

 it lacks the double row of dorsal tubercles that is characteristic 

 of other members of this genus. In outline it is ovate, widest 

 on middle segment, and it tapers more or less abruptly from the 

 eighth to the posterior end. Segments 8 and 9 terminate laterally 

 in flat triangular spines. Gills are present on segments 3 and 7, 

 and diminish regularly in size from the front backward. The 

 inferior respiratory lamina of each is bifid, and its divisions are 

 fimbriate-lamelliform. The covering lamellae on each of segments 

 2 to 6 overlaps only very slightly the base of the one immediately 

 behind it. That of the 7th segment, however, is of small size and is 

 wholly covered. The middle seta is longest, and all three setae 

 are clothed basally with minute spines and bear long hairs in the 

 middle portion, and are bare and darker colored at the tips. 



This is the most generalized nymph yet made known in the 

 Ephemerella group of May flies. None of its gill covers are wholly 

 elytroid. It has no dorsal abdominal liooks. The thorax is high, 

 almost compressed, and the abdomen is only moderately depressed. 



I name this species in honor of little Miss Dorothy Burke, who 

 played beside the delightful streamlet wherein I found it. 



