February, 1881.1 19S 



many of the cross-veinlets of the fore-wing conspicuously bordered with sanguineous, 

 their borders more or less confluent, so as to form irregular blotches. Abdomen 

 discoloured, varied with sanguineous above ; belly ochraceous. Setse pale ochraceous 

 or whitish, with joinings more or less sanguineous or blackish-sanguineous, with 

 which colour the forceps also are, in some measure, tinged. 



The markings of the ? are less distinct than those of the g . 



Long, al., S 11—12, ? 16; corp., £ 13, ? 16; set. $ 25 and 1—26, and 1mm. 



Hab. : Lahat (Leyden Mus.). 



The professedly temporary groups ranked provisionally with 

 Leptophlebia in 1871, may be dealt with as follows : — 



A. — Hind-wings somewhat arcuate in front (Trans. Ent. Soc. London, 1871, 

 pi. iv, 20a and 26d). Basal joint of the J forceps many times longer than the 

 remainder taken together. 



Blasturus, n. g. 

 Two long caudal setse, the other abortive ; lateral setae in J about 

 three times, in $ about one and a half as long as the body; median 

 seta about one-fifth as long as it. Tore tibia of $ scarcely longer 

 than the femur, the tarsus about one and three-sevenths as long 

 as the femur ; ungues of posterior tarsi dissimilar. Type, B. cupidus 

 (in Ephemera), Say. Syn., Leptophlebia, ser. 4, Etn., 1871. Distrib., 

 Temperate JS". America. 



Leptophlebia, Westw. (restrict.). 

 Three long, sub-equal caudal setae ; lateral setae of J about one 

 and a half times as long ; of $ nearly the same length as the body. 

 Fore tibia of £ scarcely longer than the femur, but the tarsus nearly 

 one and a half times as long as it ; ungues of hinder tarsi dissimilar. 

 Nymph with seven pairs of double tracheal branchiae, each one bi- 

 partite with subulate divisions distantly beset with minute hairs. 

 Type, L. marginata, Lin. Syn., Leptophlebia, ser. 3, Etn., 1871. 

 Distrib., Northern Temperate Eegions. 



Atalophlebia, n. g. 

 Three long, sub-equal caudal setae (or in individual specimens 

 sometimes only two), in the <$ usually twice as long as the body. 

 Normal species : fore tibia of <$ about one and a half times as long as 

 the femur (in $ scarcely longer than it), and the tarsus about one 

 and four-elevenths as long as the femur. Hind tarsus about half as 

 long as the hind tibia ; its ungues alike in shape, uncinate. Ex- 

 ceptional species : some Cingalese species have setae three times as 

 long as the body, the <$ fore tarsus one and three-sevenths as long as 



