27(3 THOMAS SAY FOUNDATION 



without a longitudinal stripe ; cerci brown, with about 13- 

 15 segments. 



Male. Hind margin of the eighth abdominal tergite 

 raised into a single rearward pointing blunt tubercle ; ter- 

 gites 9 and 10 with a broad median groove or depression 

 into which the supra-anal process fits; this process re- 

 curved, divided into two parts, the upper flattened, blunt- 

 ly pointed, the lower in the form of a hollowed out sheath 

 with a narrow notch on the margin just before the 

 bulbous enlargement; ninth abdominal sternite slightly 

 produced and evenly rounded behind ; subanal lobes ter- 

 minating in short upcurved sharp processes. 



Female. Hind margin of eighth abdominal sternite not 

 produced into a subgenital plate ; the middle field of the 

 eighth sternite depressed, with two longitudinal out- 

 curved dark lines. 



Distribution. — Holotype, male, allotype, female, March 

 15, 1907, Ithaca, N. Y. (Cornell University Collection) ; 

 many males and females, March 3-30, Ithaca, N. Y. ; four 

 males, four females, March 12, Orono, Me. ; males and fe- 

 males, March 20, 1924, Harmony, Col. Co., Nova Scotia 

 (W. H. Brittain). 



Capnella vivipara Claassen. 



(Plate 50, figs. 4, 5.) 

 1924. Capnella vivipara Claassen, Can. Ent., 56:46. 



Length to tip of abdomen, male, 4.5-6.5 mm.; female, 

 7-8 mm. Expanse, female, 5-7 mm. 



General color brown. Head brown, slightly wider than 

 prothorax; surface covered with fine pile; occiput some- 

 what rugulose ; hind ocelli at least twice as close to eyes 

 as to each other ; antennae brown, darker toward the tip. 

 Prothorax brown, slightly wider than long, somewhat 

 widened posteriorly ; angles rounded ; surface slightly ru- 

 gose. Legs brown ; wings absent in the males ; very short 

 in the female, not reaching half the length of abdomen. 

 Abdomen brown, somewhat darker toward the tip; cerci 

 brown, composed of about 15 segments. 



Male. Eighth abdominal tergite with a black, narrow, 

 transverse, raised tubercle before the hind margin ; supra- 

 anal process recurved, long, divided into two parts, the 

 upper angulate, heavily chitinized and at the tip enlarged, 

 the lower in the form of a hollowed out sheath, enlarged 

 towards the tip and with a broad notch on the margin be- 

 fore the tip ; subanal lobes triangular, upcurved and end- 



