256 Rev. T. A. Marshall's monograph of 



Spilodes verticalis, L., and Tachyptilia populella, Clerck. 

 Ratzebui'g's M. amentonim was bred singly in some 

 numbers from the foreign Tortrix amentana, Ratz. ; and 

 by Brischke from Phlosodes immundaiia, Fisch. The 

 dubious M. anthomyiarum, Bouche, was obtained from 

 Anthomi/ia cepariim, Bouche. Cocoon white, not woolly. 



15. Microgaster tibialis, Nees. 



Microgaster tibialis, Nees, Mon., i., 168 ; Ste., 111. M., 



vii., Suppl. 3, pi. xxxvii., f. 2 ; Wesm., Nouv. 



Mem. Ac. Brux., 1837, p. 35 ; Ruthe, Berl. ent. 



Zeit., 1860, p. 122, S' ? . 



M. nigricans, Nees, Mon., i., 167, c? . 



M. meridianus, messorius, ^ ? , and luctnosus, <? , Hal., 



Ent. Mag., ii., 239. 

 Black, including the palpi, or these may only be black at the 

 base ; legs also black, or black and red in various j)roportiona. 

 Wings infumated, paler at the base ; squamulae black, nervures and 

 stigma fuscous. Antennae subsetaceous. Face dull, thickly 

 punctulate. Body rather shining ; mesothorax finely and thickly 

 punctulate; metathorax and segments 1—2 rugose, the former 

 carinated. Terebra shorter than ^ the abdomen. ^ 2 . Length, 

 1^—2 ; wings, 2^ — 4^ lin. 



All writers agree in separating this from globatus, 

 Nees, although no intelligible difference can be i^ointed 

 out, except the colour of the legs. The structure of 

 both forms is the same, and subject to the same varia- 

 tions ; usually the $ of tibialis is a little more slender, 

 but sometimes the reverse is the case. So also with 

 respect to the rugosity of the metathorax and abdominal 

 segments. The antennse appear a little shorter than 

 those of globatus, and the last joints are subquadrate. 

 The wings are more or less deeply tinged ; sometimes 

 almost hyaline. As to the legs, the only remaining 

 means of distinction, they are (at least the hind pair) 

 either altogether black, or the femora only ; or the 

 femora are rufous with black streaks, or finally altogether 

 rufous, in which case the species become merged in 

 gh)batns. The following are the leading varieties : — 



Var. 1, M. amhigiius, Euthe. Metathorax and segments 1 — 2 

 finely rugulose ; palpi testaceous with the basal joint dusky ; legs 

 nifous, coxae and hind tarsi black. Length often only \\ lin. 



Var. 2, M. maculatus, Ruthe. Metathorax and segments 1 — 2 

 more or less finely rugulose ; palpi testaceous, or dusky at the base ; 



