226 Rev. T, A. Marshall's monograph of 



almost complete ; three cubital areolets, the 2d triangulai', mimite. 

 Hind coxae and spurs of hind tibiae short, the latter not half the 

 length of the metatarsus. Tei'ebra very short, or concealed. 



The 1st abdominal segment is furnished at the apex with a shining 

 tubercle. The 2d segment is smooth and shining, only in two 

 species dull and coriaceous. The cocoons are different from those 

 of Apanteles and Microgaster. They are pergamentaceous or 

 papyraceous, somewhat glossy, naked, grey, brown, yellow, and, in 

 two instances, pea-green, but never pm'c white. They are either 

 wrinkled, or strongly ribbed or fluted longitudinally, like the seeds 

 of Artemisia, and found singly or in small clusters. 



This genus and the following are comprised in Euthe's 

 posthumous paper on Microgaster, published by Reinhard 

 in Berl. ent. Zeit., 1860, pp. 105 — 160. The descriptions 

 are among the very best that are to be found in hyme- 

 nopterous literature. The section of Microgaster cha- 

 racterised by Ruthe {lib. cit., p. 125), containing sixteen 

 species, received from Forster the name Microplitis. 

 Reinhard {lib. cit., pp. 358 — 360) has given a summary 

 of Ruthe's work, with rectifications and a synoptical 

 table-, upon which the following is founded. 



The species generally attack Lcpidoptera, but Brischke 

 states that he has bred ]\I.fumipennis, Ratz., from two 

 saw-flies, Schizocera geminata, L., and a MacropJii/a ; 

 while Ratzeburg reports the same parasite from Emphytm 

 succinctus, Kl. 



Table of Species. 



(14) 1. First abdominal segment never more 

 than 1^ times as long as its breadth, 

 mostly shorter, not attenuated to- 

 wards the apex, which is broadly 

 rounded. 



Segment 2 dull, coriaceous. 



Hind tarsi blackish or fuscous . . 1. Spinola:, Nees. 



Hind tarsi testaceous . . . . . . 2. xanthopus, Euthe. 



Segment 2 shining, smooth. 



6. Segment 1 smooth and shining .. 3. ocellatce, Bowchk. 



7. Segment 1 punctato-rugulose. 



8. Stigma unicolorous, or only a little 

 l)alcr at the base . . . . . . 4. vidua, Euthe. 



Stigma bicolorous, determinately pale 



at the base. 

 Wings deeply infumatcd. 



Tibia) obscure rufous ; antenna' J as 



long as :l of the body . . . . "). tris1i.f, Nees. 



(11) 12. Tibi;r rufo-testaceous ; antenna^ $ 



longer than f of the body . . . . 0. ihilcin, n. s. 



