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



Blacus riificornis, Wesm., Nouv. Mem. Ac. Brux., 

 1835, p. 92 ; Eatz., Iclm. d. Forst., ii., 61 ; Ruthe, 

 Berl. ent. Zeit., 1861, p. 134, and Stett. Zeit., 

 1857, p. 160 (ein Bracon-Z witter), <? ? . 



Gamjcliorus ruficornis, Hal., Ent. Mag., iii., 42, ^ 2 . 



Dark fuscous, slender, abdomen sometimes piceous or testaceous 

 in the middle ; mandibles and clypeiis rufescent ; palpi and legs 

 testaceous. Antenna 5 stout, somewhat shorter than the body, 

 filiform, rufo-testaceous, 20 — 21-jointed (the 2 apical joints often 

 appearing to be united) ; scape and apical joints of the flagellum 

 usually fuscous, the others annulated with fuscous at the extremity ; 

 subapical joints longer than broad. Prothorax punctato-rugulose, 

 smooth at the sides above ; scutellum less elevated than in the last 

 species ; metathorax short, finely rugulose and reticulated, almost 

 vertical posteriorly, divided into 4 arese, and longitudinally cari- 

 nated. Wings broader than in most species, subhyalme ; stigma 

 brown, more or less pale, or with pale spots ; cubital and some 

 other nervures fuscous, the rest pale brown ; parastigma yellowish, 

 smallest in the 5 , so that the angle of the prsediscoidal areolet is 

 not cut off. Last joint of the tarsi infuscated. Abdomen sub- 

 clavate ; 1st segment narrow, hardly dilated posteriorly, more or 

 less distinctly rimiilose, faintly margined, not canaliculated ; the 

 following segments smooth, having each a transverse row of faint 

 punctures before the hind margin. Terebra about ^ of the abdo- 

 men. ^ . Antennae setiform, black, narrowly testaceous at the base, 

 as long as the body, 21 — 22-jointed ; wings somewhat whitish, 

 elongate ; stigma stramineous ; parastigma enlarged, cutting off 

 the angle of the praediscoidal areolet ; abdomen slender, hardly 

 subclavate ; 1st segment canaliculated. Length, 1^ ; wings, 

 3^ lin. 



Var. $ $ . Eufo-castaneoiis ; head, apex of the abdomen, and 

 sometimes the 1st segment and metathorax, fuscous. 



Ohs. I have a ? with abbreviated wings, probably 

 belonging to this species. Antennae 20-jointed ; hind 

 femora not infuscated before the apex {cf. sp. 3) ; wrings 

 very narrow, not reaching the apex of the abdomen ; 

 stigma placed near the extremity ; radial areolet con- 

 tracted, not longer than the stigma ; radius curved ; 1st 

 cubital areolet not separated from the prsediscoidal ; 

 metathorax vertical behind, not bidenticulate. Terebra 

 less than ^ of the abdomen. Length, 1 ; wings, f line. 



Ruthe has described a hermaphrodite, either of this 

 species or the following, in which the antennre, wings, 

 &c., do not correspond, being of opposite sexes. 



