1891:] A. E. Eaton — Notes on some native Ephemeridse. 407 



captures rather than of careful collecting. A series of 21 specimens 

 from theTenasserim valley, in Mr, McLachlan's collection, yields represen- 

 tatives of 9 species in 8 genera, all (except one) of small size, and some 

 of them remarkably beautiful. 



Palingenia lata. Walker. 



Seven adult c? specimens, labelled respectively " Sibs ^^-^ to 6Aii."i 

 Their wings are in a very slight degree warmer in tint than the " light 

 Vandyke brown " of the typical specimens ia the British Meseum, and 

 vary in unimportant detail from the wing-neuration figured in Trans, 

 Lin. Soc. London, 2nd sei-ies, Zool. iii. pt, i. 1 b (1884), Fore tarsus i 

 rather shorter than the tibia : joint 1 short, 2 or 5 the longest, 3 sub- 

 equal to 4 ; ungues nearly of one length, each with a minute hook. 

 For other particulars vide op. cit. p. 26, This is the only dark-winged 

 species found hitherto in Hindostan. 



The next two species have wings of a light colour. 



Palingenia robusta sp. nov. 



Two adult & specimens labelled "Cachar;" both mutilated and per- 

 haps faded. Wings defective, brownish white, dusky where bruised, 

 their stronger nervures light, raw umber brown, the weaker nervures 

 paler ; neuration similar in style to that of P. lata, but with fewer and 

 and more distant veinlets distributed to the hinder half of the terminal 

 margin. Head and notum light raw umber brown, the former blackish 

 around the ocelli : pronotum varied with blackish or dusky markings 

 comprising, — in front, an impressed sinuate transverse line ending op- 

 posite the middle of the backs of the eyes, — on each side, the border of 

 a protuberance in front of the deep lateral depression, — behind a fine 

 line along the transverse crease at the hind margin. Pleura, sternum, 

 femora and fore tibiae, dull, light yellowish brown (intermediate in tint 

 between raw umber and brown ochre) ; fore tarsus and hinder tibise 

 and tarsi paler or duller in colour, and transversely rugose : a short 

 dusky line on the mesopleuron, between the root of the costa and the 

 spiracle. Dorsum faded : the last 3 or 4 segments largely suffused with 

 light, raw umber brown, the anterior segments less and less so ; the 

 joinings sometimes pale. Venter and forceps dull, light, yellowish brown, 

 Set» dirty whitish yellow, uniformly pilose. Fore tarsus shorter than 

 the tibia : joint, 1 short ; 2 subequal to, or very little longer than 5, 3 

 shorter than 5 but subequal to 4 ; ungues nearly of one length. Hinder 



* Presented to the Indian Museum by Mr. S. E. Peal, and collected in Sibsagar. 

 Assam. 



