327 



his L. cursor are to be found, of which the colour is exactly alike. 

 Particularly large and fine specimens of L. tceniata, or rather T. acu- 

 leata (Clerck) — for such 1 consider to be the proper appellation of the 

 species — , among which is a $ ad. of Var. y (cursor) i4 millim. long, 

 have been sent to me from Gotland and Faro, where the species seems 

 to be very common. I have also received through Prof. Th. Fries a 

 few large specimens from Alten in the Norwegian Finnmark. Westring 

 had only seen half-developed specimens of his L. cursor, otherwise 

 he would instantly have perceived, that it was not a separate spe- 

 cies, but only a variety of L. tceniata, as, even as it was, he suspected. 



From T. pulverulenta and T. cuneata, in which the cephalo- 

 thorax probably never reaches a length of 4'/ 2 millim., T. aculeata or 

 1 tceniata is at once distinguished by its greater size: the cephalo- 

 thorax is in cf 4'/ 2 — 5'/ 2 millim., in $ 4 3 / 4 — 5 3 / 4 millim. The 

 legs are also longer in T. aculeata than in the above-named two 

 species, in cf near 3'/ 2 times, in $ 3'/ 3 times longer than the ce- 

 phalothorax, which is little or nothing longer than the tibia and pa- 

 tella of the 4 th pair taken together; the breadth of the cephalothorax 

 is in cf '/ 2 — 3 A millim,, in $ but little, larger than the length of 

 the tibia of the same pair. In T. pulverulenta the 4 lh pair of legs, 

 both in cf and $, is very nearly 3 times as long as the cephalo- 

 thorax, which is v., millim. longer than tibia + patella of the 4 th 

 pair, and the breadth of which is about 3 /. millim. greater than 

 the length of the tibia of the same pair. T. cuneata has still shorter 

 legs, the 4 th pair being only about 2 3 / 4 (cf) or 2% times' (Q) 

 as long as the cephalothorax, the length of which exceeds by 

 '/ 2 millim. that of the tibia and patella of the said pair united; its 

 breadth is about 3 / 4 millim. greater than the length of the tibia of 

 the 4 th pair. The male T. cuneata differs from all other species, 

 with which I am acquainted, by the egg-shaped incrassation of 

 its thighs. 



The sexual organs in T. tceniata, T. aculeata, T. pulverulenta 

 and T. cuneata are so similar, as scarcely to ofTer any observable or 

 trustworthy marks of distinction between these species. The vulva 

 is, in all four, formed of a little oblong, tolerably deep, almost semi- 

 elliptic fovea somewhat broader behind , and there enclosing a small , 

 transverse costa or plate, more or less visibly depressed in the middle, 

 and usually exhibiting two small depressed points on the posterior 

 margin; this costa is connected with a low narrow septum at the bottom 

 of the fovea. The bulbus has on the under side, outwards, a trans- 



