172 On the Braconidse in the British Museum. 



Hah. North China. 



The type of the genus is from New Guinea, but this appears 

 to be congeneric 



Genus HELCON, Nees. 

 Helcon unicornis, sp. n. 



5 . Nigra ; mandibulis basi, coxis trochanteribusque posticis, 

 femoribusque posticis, apice nigro excepto, ferrugineis ; tegulis, 

 palpis, segmento abdominali primo, pedibusque anticis inter- 

 mediisque testaceo-ferrugineis ; tarsis posticis, articulo apicali 

 excepto, albidis ; antennis 37-articulatis, articulis 10 basalibus 

 fusco-brunneis, 11-18 albis, apicalibus nigris ; alis hyalinis, 

 venis fuscis. 



Long. 9 mm. ; terebrse long. 6 mm. 



? . Face rugose, with a few oblique strise on each side ; 

 vertex and front smooth and shining; the frontal depression 

 not very deep, but strongly margined laterally, from ihe 

 anterior portion of the depression rises a strong blunt horn, 

 which rises higher than the raised lateral margins of the 

 depression. Cheeks more than half as long as the eyes. 

 Thorax closely and rather finely punctured ; median lobe of 

 the mesonotum not prominent ; parapsidal furrows crenu- 

 lated ; mesopleura? smooth and shining; the mesonotum 

 behind with distinct transverse striae in the middle; basal 

 half of the scutellum occupied by a deep longitudinally 

 striated depression. Median segment transversely rugulose, 

 with four strong longitudinal carinse on the dorsal surface, 

 the sides of the segment rugose-reticulate. First tergite 

 rather coarsely punctured-rugulose, a little more than twice 

 as long as its apical breadth; second tergite indistinctly 

 punctured-rugulose at the base, shining at the apex ; the 

 apical tergites smooth and shining. Hind femora very finely 

 serrate in the middle beneath, with a stout spine beneath 

 before the apex. The second transverse nervure in the anal 

 cell of the fore wing is only faintly indicated. First discoidal 

 cell distinctly petiolate; second abscissa of the radius less 

 than twice as long as the first, as long as the second trans- 

 verse cubital nervure, less than half as long as the cubital 

 margin of the cell ; second transverse cubital nervure oblique ; 

 nervulus slightly postfurcal. 



Hah, French lndo-China (received from A. Vuillet). 



The frontal excavation is smaller than is usual in the genus, 

 and does not extend as high as the anterior ocellus, differing 

 in this respect from the Japanese H.cornutus i Cam., in which 

 the excavation is very large and deep. 



