142 Mr. Bridgman's additions to Mr. Marshall's 



detritus, and all were females. The year before last 

 Mr. Barrett sent me P. ijisolens, which he bred from 

 S. carpini ; all were females ; whilst from another 

 host he bred two males very like, if not a variety of, 

 Hemimachus instahilis. This preponderance of one sex 

 or the other is very unfortunate ; however, I had the 

 good fortune to find, in a box belonging to Mr, Fitch, the 

 male and female of a bred PezomacJius, viz., P. antJira- 

 cinus, the male of which is just as conspicuous amongst 

 the known male Pezomachi as the female is amongst her 

 sex. 



Many of the insects I have seen have been extremely 

 difticult to determine from the method of preparation, 

 the majority being indiscriminately gummed down on 

 card ; many I have had to float off the mounts, examine 

 and recard, necessitating a considerable loss of time, 

 and sometimes some damage to the specimen. There 

 are many Ichneumons in which it makes little or no 

 difference if they are carded or pinned, but to recognise 

 which method is the best for certain species or genera 

 requires an intimate acquaintance with the distinguish- 

 ing points of the insects ; it is safer to pin them all,- 

 using a fairly long pin, and push the insect about half- 

 way up the pin, and, if the wings can be prevented from 

 folding over the back, this method leaves but little to be 

 desired ; the pin of course should be put through the 

 dentre of the mesothorax, avoiding the scutellum. In 

 conclusion I beg to thank all those entomologists who 

 have so kindly assisted by sending their insects for 

 examination ; especially are my thanks due to Mr. E. A. 

 Fitch, not only for insects, but advice and the kind 

 assistance he has always rendered me in every way in 

 his power. 



ICHNEUMONIDiE. 

 ICHNEUMONIDES OXYPYGI. 



IcJnic'ttmon sangidnatuv, Rossi. 



This insect, which appears in Desvignes' ' Catalogue 

 of Brit. Ich.,' p. 29, was j)laced by Marshall in his 

 Catalogue of 1872 as a Phygadeuon, which is a mistake, 

 /. sanguiitator, Eossi, if this be the same species as 

 /, rtiJicoUis, Stephens, is a very distinct insect from 

 Crifptus sanguindior, Desvignes : this Ichneumon has 

 been taken in some numbers by Mr. Billups at Headly 



