942 RECORD OP CURRENT RESEARCHES RELATING TO 



tracheae ; (3) by caudal brancTiial appendages equally well provided 

 with trachcfe ; (4) by rectal branchife formed of three columns in the 

 mucous system of the rectum, well provided with trachece. No doubt 

 the four kinds of respiration do not act simultaneously, and the 

 stigmata of the abdomen j)robably never, as they only receive a 

 simple tracheal branch, but the stigmata of the prothorax are provided 

 internally with numerous well-developed tracheae, and perhaps serve 

 for the expulsion of used air. 



Mr. E. MacLachlan, in commenting * upon the preceding, de- 

 scribes it as " a most important physiological discovery, and showing 

 how little is yet known of the structure of the larvae of dragon-flies. 

 The beautiful genus Euplicea inhabits tropical Asia and the islands of 

 the Eastern Archipelago." 



Poduridae from Switzerland. f — Dr. G. Haller records the capture 

 of four species of Poduridae, two from the canton of Berne, and 

 two apparently from near Zurich. 



»0f the former cases, one is that oi Achoreutes purjmrascens Lubbock, 

 which occurred over an extent of 10 metres of a road, in the puddles ; 

 the other, that of an apparently new species of the same genus, which 

 was found in patches on damp earth of some millimetres in depth, 

 and in one instance of about 16 square inches in extent. The name 

 A. Scliluppii is proposed for this form, which is distinguished by the 

 large size of its head (one-third the length of the body, which does not 

 exceed 1 millimetre). The antennte are very thick, and dark violet 

 in colour ; the head is light reddish brown ; the body is remarkably 

 constricted between the sixth and seventh segments, and varies from 

 brick-red colour to near that of A. purpurascens. The whole is 

 covered with short bristles, which are of larger size on the abdomen. 



The new genus Lubhockia is formed to contain a species found in 

 moss near Zurich, and closely allied to Achoreutes. The genus is thus 

 defined : " Body cylindrical, segments subequal. Eyes ? Antennae 

 extended, longer than the head, slender, five-jointed. Accessory claws 

 on the four front feet very small, scarcely to be distinguished ; 

 plainer on the third pair. No scales or knobbed hairs, but two strong, 

 slightly bent pairs of spines, near the hind margin of the body. 

 Leaping-fork very small." The species is named L. ccerulea. The 

 body is dark blue above, lighter below ; the S2)ines are golden yellow. 

 Hairs occur, at some distance apart, on the legs and on the upper part 

 of the body. Total length 1^ millimetre. 



A new species of Isotoma, I. Turicensis, is described, from moss in 

 the same locality as the LuhbocMa. Its back is blue-black, the ventral 

 surface lighter ; anal spring and legs below the coxae, almost colour- 

 less. Terminal segment of fork ending in three tiny warts. Body 

 clothed with closely set, colourless hairs, mixed with a smaller 

 number of bristles. Two large bristles near the hind edge of the legs. 

 Length about 1 millimetre. Closely allied to I. arborea Lubbock. 



* ' Eutomol. Mon. Mag.,' vii. (1880) p. 90. 



t 'MT. Schweiz. Entomol. Ges.,' vi. (1880) p. 1. 



