Catalogue of British Ichneumomda* 365 



Pezomachus sylvicola, Fst. 



Fst., Mon. Gatt. Pez., 102, 27, ? . 



Mr. G. C. Champion has taken a female Pezomachus, 

 which I helieve to be this species. It differs only in one 

 respect from Forster's description: he says, " aculeus 

 scarcely as long as the 1st segment." Mr. Champion's 

 insect has the aculeus about one-third the length of the 

 1st segment. I believe the aculeus varies in length in 

 some species; in P. Neesii it varies very much. This 

 insect looks a great deal like a very smooth and shining 

 specimen of P. zonaius. 



A single female was taken at Caterham. 



Pezomachus Neesii, Fst., ? var. 



I have seen amongst Pezomachi collected by Mr. 

 Billups and Mr. Champion what I considered a small 

 variety of P. Neesii, Fst., but on closer examination I 

 find the differences constant; the aculeus projects 

 rather more than is usual in Neesii, the 1st segment 

 only of the abdomen is red, the remainder purplish 

 brown with the incisions faintly reddish, the base of the 

 antennae generally darker, and iiagellum with eighteen 

 joints; whilst the genuine P. Neesii, with the partially 

 red 2nd segment of the abdomen, always, as far as my 

 observation goes, has twenty joints in the flagellum. I 

 am inclined to think it is a good species and not a 

 variety. 



Pezomachus Debeyii, Fst. 



Fst., Mon. Gatt. Pez., 110, 37, ? . 



Mr. Champion has taken a Pezomachus at Sheppy, 

 which agrees with this species, except that it has the 

 spiracles on the 1st segment slightly projecting. 



Pezomachus temulus, Fst. 



Fst., Mon. Gatt. Fez., 146, 86, ? . 



In Mr. Champion's collection are two specimens of a 

 Pezomachus which I believe to be this species ; it differs 

 from Forster's description in having the aculeus longer, 

 which he says is scarcely longer than half of the 1st 

 segment; these two have it almost as long as the 



