92 Eev. T. A. Marshall's monograph of 



specimen 45-jointed), rufous on the basal half of the flagellum. 

 Terebra hardly visible. Wings short, as in the $ , somewhat 

 darker, with a hyaline stripe. Length, 2^ — 3 ; wings, 4§ lin. 



<? 5 . Mandibles rvifous, palpi black ; eyes small and not very 

 prominent, whereby the vertex behind them appears scarcely 

 narrowed, and the inferior margin of the eyes is above the upper 

 margin of the oral aperture. Mesopleurae punctate, somewhat 

 shining, rugose under the wings, with a dull rugose fovea below. 

 Abdomen short and stout, segments 1 — 2 striato-rugose, 3d at the 

 apex, and all the following, smooth and shining ; segment 1 some- 

 times with a basal black spot, not longer than its apical breadth, 

 very slightly narrowed at the base ; 2d transverse ; 3d and following 

 with very fine scattered hau's. Second cubital areolet transverse, 

 a little shorter than the podiscoidal. 



Var, a. A facial spot, base of the antennae, mesothoracic sutures, 

 scutellum, and two si)ots on the metathorax, rufous. $ . 



Var. /3. Head and thorax more or less fiiscous or black ; man- 

 dibles rufous. ? . 



? Var. y. Metathorax rufous. 



I have a ^ taken at Niton, Isle of Wight, another 

 from the Pyrenees, and a ? from Darenth Wood. The 

 last has the metathorax rufous ; the antennte are not 

 quite as long as the hody, 45-jointed ; the infuscated 

 wings, and the tarsi, are shorter than in gasterator, to 

 which I should otherwise have referred this specimen. 

 R. dimidiatus is widely diffused in Euroj e, from the 

 Baltic to the Mediterranean ; its occurrence in England 

 is therefore nothing remarkable. Giraud records it as a 

 parasite of Bomhyx quercus, L., and Nemeophila russida, 

 L. The Vienna Museum contains a specimen of var. /3. 

 (head and thorax black) bred from Caradrina alsines, 

 Brahm (Berl. Ent. Zeit., 1865, p. 243). 



5. Rhogas gasterator, Jurine. 



Bracon gasterator, Jur., Hym., pi. viii.. Gen. 3, ? , 



ant., mand. (nee Spin.). 

 Rogas gasterator, Nees, Mon., i., 212, <? 2 ; Hal., Ent. 

 Mag., iv., 99 ? (not the ^ ) ; Pieinh., Berl. ent. 

 Zeit., 1863, p. 259, <? ? . 

 Colours as in the preceding, but the hind tibiae of the ^ are 

 yellowish at the base. Eyes large ; vertex a little narrowed pos- 

 teriorl3^ Antennae (? ? as long as the body, of the ^ 53 — 58- 

 jointed ; in the ? the base of the flagellum is rufous. Meso- 

 pleurae with a smooth subobsolete fovea. Length, 3 — Si; wings, 



