204 Mr. F. W. Edwards on 



scales on the mesonotura, and I am acquainted with a British 

 species which possesses similar scales. From tills last, and 

 probably also from the species described by Kieffcr, C.eltoni 

 differs conspicuously in the structure of the male hypo- 

 pygium. Iq many respects C. eltoni resembles Kieffer's 

 Dach/Iocladius petr(Pus, var. ur sinus, but among other dis- 

 tinctions the fork of Cu is shorter. 



Camptocladius oxonianus , sp. n. 



Bear Island: Walrus Bay, S.E. of island, 22. vi. 1921 ; 

 c. 20 ft., on stones ; 6 ? . 



? . Entirely black ; thorax slightly shining ; eyes small, 

 entire, bare. Palpi short. Anteniia3 6-segmented ; seg- 

 ment 2 rather stout, nearly twice as long as broad, slightly 

 constricted in the middle ; 3-5 constricted at each end, 

 with long verticil-hairs; 6 slender, fully twice as long 

 as 5, without verticil-hairs, but with about six sets of 

 short pale sense-bristles. Mesouotum without scales. Leys 

 without long hairs. Fourth tarsal segment on all the 

 legs about two-thirds as long as the fifth. Empodiuni 

 almost as long as the claws. No pulvilli. Wings dingy 

 whitish, the anterior veins scarcely darkened. Membrane 

 quite bare, with a vacuolated appearance under a magni- 

 fication of 80. Costa not extending beyond the tip of 

 R^. Distance from tip of Z?4 to tip of M about equal to 

 that from tip of M to tip of Cw^. Ri short, only about 0*4 as 

 long as i?4. i?2 ending in costa close to the tip of R^. Base 

 of fork of Cu distant from the base of M by about twice 

 the length of the cross-vein. Cu^ rather strongly curved 

 downwards beyond the middle, widely divergent from Cu^. 

 Halteres black. Wing-length 1*8 mm ; body-length about 

 1"5 ram. 



In spite of the regrettable absence of the male, it seems 

 worth while to describe this species, since it is the only one 

 yet found in the islands in which the costa ends at the tip of 

 itj. I have been unable to trace a description of a European 

 species which fits it exactly. Kiefi'er's C. tibialis seems to 

 be similar in many respects, but has the fourth tarsal seg- 

 ment longer than the fifth. 



Key to the Species o/ Camptocladius {sens, lat.), now knoivn 

 from Spitsbergen and Bear Island. 



1. Wings white or whitish, the membrane quite 



bare 2. 



Wings pale greyish, the membrane with minute 

 setie 2-4 fi long 8. 



