ORIEXTAI, COI.LEMBOLA. 91 



eyes densely pigmented, iippearing as two black dt)ts on each side 

 of the head. 



Length 1-5-2 mm. 



Three exnmples, taken mider stones nt tlie edge of a spring in 

 the Kurseong District, E. Himalayas, 4700 feet {X. Aituandale, 

 March 25th, 1910). 



No, '^^ Indian Museum Coll. 



This species is readily distinguishable from Isotoma quadri- 

 oaddta Tullb. b}- tlie fact that the dentes are much longer than 

 the manubrium, and that the mucrones are tridentate. 



Sub-fam. Tomocekin.e Schiift'. 

 Genus ToMocERus Nicolet. 



Tomocerus Nicolet, Rech. p. serv. a Thist. des Podur., 1841, 

 p. 67. 



Tomocerus vulgaris Tullb. 



Syn. 1871. Macrotoma vulgaris TuUberg, " For-t. ofver 8v. 

 Podurider," Ofvers. Kongl. Vet.-Akad. Forhandl. xxvii. p. 149, 



1893. Tomocerus vulgaris Schott, " Zur 8yst. und Verbreit. 

 Pahearc. Coll.," Kongl. Svenska Vet.-Akad. Handl. xxv. p. 41. 



A foi-m closely resembling the type species and difiei'ing only 

 in the following points : — 



a. Smaller in size. 



b. Ten instead of 12-16 spines to the dentes. 



c. The basal tooth of the mucro lai-ger and moi'e pointed 



than is represented in Tullberg's hgure of T. vulgaris^ . 



Length 3 mm. 



Two specimens, taken under stones near the edge of a mountain 

 stream at Badrinath, Garhwal Himalaya, 10,300 feet {A.D. Imms, 

 May 27th, 1910). 



No. -^- Indian Museum Coll. 



lb 



In both examples the antennse possessed only three joints, 

 which were related to one another in length as 7 : 12 : 70. The 

 antennse themselves measured 2*2 mm. long. 



On account of the small size of the specimens and their 

 possessing only three joints to the antennae, instead of the normal 

 number of four, I believe that they are immature individuals 

 of the above species. They are pi-obably to be regarded as a 

 Himalayan vaiiety of the same, but this point cannot be definitely 

 determined until adult specimens have been discovered. 



Sub-fam. Heteromuricin.e, sub-fam. nov. 



This sub-family is characterised bv the presence of a median 

 cercus to the fifth abdominal segment. 



* Svcriges PofhiriJer, pi. iv. fig. [>, 



