( nn 



Abdomen. — The seventh tergite bears three apical bristles, of which the upper- 

 most is at least two-thirds the length of the middle one in the tj, while in the 

 ? both the dorsal and ventral one are less than half the lengtli of the middle 

 one. In rharlotfeiisis the ventral one is about two-thirds the length of the middle 

 one in both sexes. 



Legs. — On the outer side of the hindfemur there are two or more bristles near 

 the base. The longest apical bristle of the first hindtarsal segment reaches a little 

 be\-oud the apex of the second. On the fifth segment of all the tarsi there are 

 four lateral bristles and a sabapical hair, there being in addition one or two ventral 

 snbbasal bristles on the fore- and midtarsi, and one such bristle on the hindtarsus 

 between the first pair of lateral bristles. The measurements of the mid- and 

 hindtarsi are as follows : — 



Modified Segments. — S. The eighth tergite is very short (PI. IX. fig. 30, 

 viii. t.j, while the sternite (viii. st.) is enlarged, bearing at the apical edge 

 a row of bristles, of which those standing near the angle are very long. The 

 process of the clasper is triangular, and bears very long bristles along its distal 

 edge (PI. IX. fig. 30, r). The finger is enormously enlarged (f). It bears 

 numerous fine hairs along the edge. Its inner surface is very densely hairy in its 

 upper fourth, and there is also a patch of rather longer hairs near the ventral distal 

 bend of the edge. The manubrium (m) is nearly straight. The vertical and 

 horizontal portions of the ninth sternite are bent towards each other forming an acute 

 angle, which, however, is rounded ofl'. The right and left halves are quite separate 

 from each other, except at the ventral angle, each side of the body having its own 

 " boomerang." In this character C. telegoni approaches the species of the genus 

 Ctenoplithalmus, which have the two halves quite separate. This sternite bears 

 at the apex one short stout spine, and behind it some fine hairs, upon which follow 

 further proximad two peculiar curved bristles, which are very pale, being apparently 

 flat, these bristles resembling those scale-like ones described in Nov. Zool. xi. 

 p. 638, PI. XIII. fig. 65. Still further towards the body a membranous fla]) 

 projects from the sternite, bearing at the apex some variable spines, which are curved 

 towards each other like the bent fingers of a hand. At and near the upper edge the 

 sternite bears a row of hairs. 



? . The seventh sternite of C. teleyoni (PI. IX. fig. 27, vii. st.) is shallowly 

 bi-emarginate, while in charlotte nsis the lower sinus is absent, the apex of the 

 segment appearing feebly emarginate from top to bottom. The eighth tergite 

 bears a row of short bristles from the dorsal edge downwards as shown in the 

 figure, and an apical ventral patch of bristles (PI. IX. fig. 27). The eighth 

 sternite is pointed and bears a few extremely small hairs at the upper edge. 



Length : <S and ? , 2-2 mm. 



We have six examples of this sjjecies, all collected by Mr. (x. F. Dippii', as 

 follows : — 



3 tjc?. Horse Creek, Upper Columbia Valley, October 1 4th, 10u3. Aficrotus 

 drammoitdi. 



