JO- •' The Irish Naturalist, 



. AGARINA. 



GAMASIDJE. 



Camasus attenuatus (Koch), Berlese. 

 (Plate 2, figs. 4-9.) 

 My best thanks are due to Mr. A. D. Michael, F.LS., for kindly 



suggesting, from my rough sketches, this identification. He states the 



species to be not uncommon in England among dead leaves, &c. 



Length, 1*3 mm. Pale fawn colour. Body elongated. Epistome (fig. 6) 

 terminating with three points, of which the central is the longest. Man- 

 dibles (fig. 7) with evenly rounded fingers, the upper with a tooth near 

 apex. Second pair of legs (fig. 5) greatly thickened, third joint with a 

 long, curved blunt tooth beneath at base, and a shorter bifid process ; 

 fourth and fifth joints with short, blunt processes at apex; sixth joint 

 without any process. 



This mite is closely allied to G. magnus, Kramer^ with which the form 

 of the epistome agrees almost exactly. It differs from that species 

 however in the even shape of the mandibles, which have no projection 

 above. From G. subkrrauens, Kramer-, it may be distinguished by the 

 sides of the epistome being straight, not convex, as well as by the 

 armature of the second pair of legs. In this last character, as well as in 

 general aspect, our species agrees nearly with a Carniolan cave species, 

 G. niveus, WankeP, but in that form the epistome is figured as ending in 

 a single pointed process. 



All the Gamasidae are blind; several species are known from caves, 

 and many live in concealment beneath stones, dead leaves, &c. 



INSECTA, 



COLIvEMBOLA. 



ENTOMOBR YIDyE. 



SInella cavernicola, sp. nov. 



(PI. 2, figs. 11-16.) 

 Length of head and body, 2-5 mm. White. Eyes wanting. Antennae 



nearly twice as long as head ; terminal joint the longest, slender, ringe 

 with clubbed hairs (fig. 12). Tarsal joints without tenent hairs, large 

 claw of first pair of feet with small tooth (fig. 13a), others without 

 distinct tooth (fig. 13). Fourth abdominal segment hardly as long as the 

 three preceding. Spring two-thirds as long as body ; terminal claws 

 evenly curved, with a small tooth as in S- curviseia, Brook, No clubbed 

 hairs on thorax, but a large number of short ones on hindmost abdominal 

 segments and on spring. 



The genus {Sinclla) to which this species evidently belongs, is distin- 

 guished from Isotovia by the possession of clubbed hairs, from Enlomobrya 

 {Degeeria) by the absence of tenent hairs on the feet. It is very vsimilar to 



* Arch, fur Nattirgeschichte, xlii., 1876, p. 91. pi. iv., fig. 9, pi. v., ff. 14,33. 

 2 T. c, p. 92, pi. v., fig. 24. 



^ Siiz. Kaiserl. Akad. IVini, {Mat. -Aat, -Class), vol. xliii., 1S61, p. 262, pi. 

 iv., fF. 8-10. 



