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



with parallel sides ; 2 a little broader tlian 1, somewhat shorter 

 than 'S. Terebra subexserted. Anal forceps of the J exserted. 

 Valvula ventralis J not surpassing the anus. ^ J . Length, f — 1 ; 

 wings, 2 — 2^ lin. 



This smallest species of the genus differs homflavipes, 

 Hal., in the colour of the legs and belly, as well as the 

 shorter 1st abdominal segment. Antennae ? as long as 

 the body ; of the S much longer and stouter. The 2d 

 cubital areolet forms an isosceles triangle whose base is 

 obsolete, so that nothing but the thickening of the other 

 two sides hinders the insect from being joined to Apan- 

 teles. The spurs of the hind tibife are shorter than half 

 the metatarsus. 



Reinhard established the species from a pair of un- 

 know^n origin. Bignell has since reared a brood of thirty 

 from Chora glahraria, Hiib., and in Fitch's collection are 

 a $ and ? from the same larva, with cocoons of a larger 

 number. The specimens were named by Reinhard him- 

 self. Five more broods in the same collection have been 

 destroyed, but their cocoons remain, together with two 

 caterpillars of glahraria. Cocoons and habits of the 

 larva similar to those of M. alvearius and Jlavipes. 



5. Microgaster marginatus, Nees. 



Microgaster marqinattis, Nees, Mon., i., 169, ? ; Ruthe, 

 Berl. ent. Zeit., 1860, p. 155, ? . 



5 . " Black ; palpi pale ; lateral margins of segments 1 — 3 — 4 

 above and beneath, rufo-testaceous ; base of the belly, and some- 

 times the posterior edges of segments 3, 4, yellowish ; legs rufo- 

 testaceous, the hind pair more obscure, their coxae above more or 

 less, the apex of their femora, their tibiae at both ends, and their 

 tarsi, black; 4 anterior tarsi black at the tips. "Wings dusky 

 hyaline, squamulae testaceous, stigma and nervures dark fuscous. 

 Antennae longer than the body, fuscous above, ferruginous beneath, 

 fiUform. Mesothorax thickly and finely punctured, dull, scutellum 

 with larger but more scattered punctures ; rnetathorax rugulose, 

 carinatcd. Segment 1 somewhat widened posteriorly, very little 

 longer than broad, canaliculated, thickly punctato-rugulose ; 2 sub- 

 quadrate, rather longer than 3, finely rugulose, imjjressed with two 

 longitudinal i)arallel lines, enclosing a raised cariniform space ; 

 3 coriaceous, its hind margin, with the rest of the segments, 

 smooth and shining. Terebra about ^ the length of the abdomen. 

 Valvula ventralis not surpassing the anus." — Ruthe. 



