British Braconidce. 239 



emerged. We have already seen that one or two species 

 of Apantcles arrange their cases simihirly. The fact, 

 thus explamed, indicates no special instinct on the part 

 of these parasites, being merely an inevitable result. 



Cocoons of M.favipes ex B. repandata. 



Of 23 European species of Mierogaster described by 

 Euthe and Reinhard, the following seven have not yet 

 been detected in England: — nohilis, Reinh., sticticus, 

 Ruthe, rnficoxis, Ruthe, procerus, Ruthe, deprimatoi', 

 Nees, Wcsmaelii, Ruthe, and dorsaUs, Nees. M. dcpri- 

 miitor, Nees, which I have taken in the Pyrenees, is con- 

 jectured by Ruthe to be a parasite of Bomhus terrestris, L. 

 If this be correct, its occurrence here is very probable. 

 Brischke says he has bred it from spiders' nests ; but 

 this is inconsistent with the known habits of the whole 

 tribe, none of which are external parasites, but live 

 within the body of a single victim larger than them- 

 selves. 



Table of Species. 



Section I. First segment distinctly longer than its 

 apical breadth. 



(12) 1. Second segment not shorter than the 3d. 

 (9) 2. Segment 2 without longitudinal im- 

 pressed lines on the disk. 



(4) 3. Head and thorax more or less testa- 



ceous .. .. .. .. ..1. alvearius, Sinn. 



(3) 4. Head and thorax black. 



(G) 5. Metathorax rugulose ; terebra exserted 2. posticus, Nees. 



(5) 6. Metathorax smooth ; terebra very short. 

 (8) 7. Legs (except the hind coxns), and sides 



of the belly, testaceous ; length, 



1 line .. .. .. .. .. 3. .//((r/^)('s, Hal. 



(7) 8. Legs pitchy-fuscous ; sides of the belly 



black ; length, J line . . . . 4. viinutus, Keinh. 



(2) y. Segment 2 with two impressed longi- 

 tudinal lines on the disk. 

 (11) 10. Metathoi;ax carinated . . . . . . ',. marfiijiatus, Nees. 



(10) 11. Metathorax canaliculated . . . . G. calceatus, Hal. 



(1) 12. Second spgment much shorter than 

 the 3rd, 



