Catalogue of British Ichneumonidce. 161 



part of 3rd segment ochraceous or pale piceous-recl ; 

 legs of the same colour, as well as stigma and nervures. 

 Length, 2 mm. or a little more. 



Aptesis Foersteri. 



Last year I described this species as new. I now find 

 it is only a very short-winged Catalytus, a genus I had 

 not then seen. This appears to be C. Mangeri, Gr. Last 

 summer I took a male with almost fully-developed wings, 

 and have seen a female of C. fulveolatus, Gr., and, 

 except the length of the wings, could detect no difference 

 between them. It seems to me that Catalytus is a very 

 weak genus ; in fact there seems no distinct generic 

 characters to separate Catalytus, Aptesis, and Thcros- 

 copus from one another, and they might fairly be included 

 in one genus ; perhaps Oresbius, Marshall, would not be 

 much out of place if associated with them. 



Pezomachus dubitator, Foerst. 



In a previous paper (Trans. Ent. Soc. Lond., 1881, 

 p. 156), under the above heading, I noticed a Pezomachus 

 which I thought might be the above species. I have 

 now but little doubt that they do not belong to this 

 species, but are small dark varieties of Pezomachus analis, 

 Foerst., having only the first two segments red, and 

 sometimes the 2nd is deeply stained with brown. I find 

 in almost all the species of Pezomachus that I have seen 

 in any number that colour cannot be depended on for 

 specific distinction. The one under discussion varies 

 from having only the 1st segment of the abdomen red 

 to those having the abdomen almost entirely red, only 

 one or two of the apical segments being stained with 

 brown. 



Mr. Bignell has been fortunate enough to breed the 

 dark variety, and with this three males which agree 

 exactly with Foerster's description of P. conveniens, 

 Mon. Pez., 231, 195. Of these three, two are rather 

 darker than the description whilst the other is as 

 described by Foerster. They were bred from Zygcena 

 tilipendidce. 



