NEW BRITISH SPECIES, ETC., IN 1864. 53 



15. Tachinus pallipes, Gray., Mon. 20, 38 [Tachyporn^) 



Kraatz, Ins. Deut. ii. 407, 8 ; D. Sharp, Ent. M. 

 Mag. vol. i. p. 168. 

 humeraUSy var. I. Grav. 

 humeralis, var. a, Gyll. 



Mr. Sharp records tlie capture of a Tachimts by himself at 

 Edinburgh, and which he refers to the above species, though 

 with some hesitation, chiefly on account of the elytra being 

 longer than the description warrants. 



It appears to resemble T. rufipes very closely, but to have 

 paler legs, and the margins of the thorax yellow. 



In the male the upper plate of the seventh abdominal seg- 

 ment ends in four not very acute teeth, the middle pair being 

 most prominent; the triangular notch which separates them 

 not extending so far as the termination of the external teeth. 

 In the female the cori-esponding plate ends in four long sharp 

 teeth, the central ones being a very little the longer, and the 

 notch between them reaches very nearly to the point where the 

 outer pair commence getting narrower. The underplate ends 

 in six teeth, the external ones being the shortest and the cen- 

 tral ones the longest. The notch between these last is broad 

 and not plain at the base, but containing a short broad tri- 

 angular tooth. 



16. Stenus longitarsis, Thomson, Skand. Col. ii. 213, 



214; E. C. Rye, Entom. M. Mag. vol. i. 37. 

 Closely allied to S. ater^ Mann., from which it differs as 

 follows: — It is smaller, the head is narrower and more 

 deeply excavated; the palpi have the first joint, and the ex- 

 treme base only of the second joint, light in colour; the 

 thorax is shorter; the elytra are longer and more convex 

 (especially behind), and with the interstices rather more 

 shining. 



