0\ THREE NEW SPECIES OF IXDIAX BRACONIDAE. 



131 



Rhogas (Heterogamus) percurrens, sp. n. 



?. — General colour of antennae,* body and legs pale ferruginous. The ocellar 

 triangle, but not the ocelli themselves, blackish. Mesonotum with a broad longi- 

 tudinal faintly infuscated band inside each notaulus and two narrow short ones on 

 the mid lobe anteriorly. Wings with costa, including basal three-fifths of the stigma, 

 concolorous with the body, apical two-fifths of stigma infuscated. Nervures mainly 

 darkened, but the second abscissa of the cubitus very pale. Abdomen a little 

 darkened posteriori}' from about the middle of the fourth tergite. Venter all pale ; 

 sheath of ovipositor blackish brown. Antenna with joints subequal, about one-third 

 longer than broad. Thorax with transverse sulcus at base of scutellum crenulate 

 with about eight large punctures or pits. Sides of scutellum with seven to eight 

 short, stout, parallel ridges. Metanotum, apart from the usual divisions, smooth. 

 Propodeon, in the type, with the median keel not completely percurrent, reaching 

 back only to about two-thirds ; the surface on each side of the keel irregularly 

 rugulose ; spiracle moderate, oval, a little over twice its length from the anterior 

 edge. 



Ficr. 



Basal portion of antenna of (a) Heterogamus dispar, Curt. 



percurrens, sp. n. 



{b) Rhogas (Heterogatnus) 



In the wings (fig. 1, b) the second cubital cell is a little, but quite perceptibly, 

 narrowed distally, the second abscissa of the radius being slightly inclined to the 

 third abscissa of the cubitus ; first intercubital nervure and second abscissa of the 

 radius subequal, the latter again much longer than the second intercubital. The 

 radius and cubitus strongly divergent distally. The stigma distinctly broad. 



Abdomen with the median keel percurrent to the posterior edge of the third 

 tergite, sharply defined throughout its course, though broader on tergite one. 

 Throughout its course the mid keel is flanked by numerous subparallel longitudinal 

 ridges or rugae, these being continuous from tergite to tergite and extending even 

 to the anterior or basal one-third of tergite 4. The first three tergites are rigid, 

 and the sutures (especially the first) deep and distinct.' The second suture (between 

 two and three) might almost be described as crenulate, as the sulcus is cut into little 

 pits by the percurrent rugae. Be\'ond the basal one-third of the fourth tergite 

 the surface is smooth ; only the smooth edge of the fifth tergite is visible. 



Length just over 5 mm. ; alar expanse, 9 mm. 

 Type a $ in the British Museum. 



* In the single antenna preserved, which is complete up to the 23rd joint (21st of the funicle) 

 the colour is uniformly pale ferruginous without any suggestion of banding. 



