136 HALIDAY ON 



Subgen. V. — Macrocentrus. 



Paljii Idbialis 4^-articulati ; caput valde oblatum ; occiput 

 imniarginatiim retusum ; vertex transverse fastigiatus : 

 abdomen lineare, segmentis anterioribus stibcsqttalibus, 

 2^°. marginato : aculeus elongatus : pedes elongati, calca- 

 rihus conspicuis : alarum anticarum areolce cubitales tres. 



*Bracon Fam. I. B. a. Lineares . A^. ab Ess. Berl. Mag. V. 



13. 

 Rogas Sect. I. Lineares . . . Act. Acad. IX. 306. 



. . . Monogr. 200. 



Macrocentrus Curtis. Ent. Mag. I. 187. 



Gen. DXLVI. 



Caput thoracis latitudine, valde oblatum ; occiput superne retusum, 

 immarginatum ; vertex transverse compressus, in lineam contrac- 

 tus ; ocelli elevati ; frons inermis, abrupte declivis ; oculi 

 ovati ; facies lata planiuscula ; clypeus transversus, linea impressa 

 utrinque foveolata sejunctus : mandibulse arcuatse, acute biden- 

 tes : labrum lineari-transversum, epipharyngis ligula apicali atte- 

 nuata prostante : maxillae lobus obtusus, membranaceus aut 

 firmioris substantise : palpi maxillares modo elongati, et tum 

 ratio articulorum fere qualis Helconti ; modo (in H. injirmo,) 

 breviusculi, articulis 1""°. et 2'^°. ratione reliquorum minus ab- 

 breviatis, 3*^°. obovato, exterioribus breviusculis : labii lobus 

 integer obtusus : palpi labiales 4-articulati ; articulus l™us_ g^ 

 2dus_ subsequales, ille obconicus hie dilatatus obovatus ; 3*'"^. 2^°. 

 longior, aut vix longior ; 4'"^ longior linearis ; (in H. infirmo 

 vero ardculi longitudine subsequales, 3*^^"^ et 4*^^ obovati :) 

 antennae basi distantes, corpore plerunque longiores in utroque 

 sexu, graciles setaceoe, 30 — 50-articulatce : thorax oblongus sub- 

 compressus ; mesothoracis lobi tuberosi ; metathorax brevis 

 subtruncatus : abdomen thorace longius et angustius, lineare, 

 apice compressum, dorso planum : segmenta discreta 8 ; 1™"™. 

 longiusculum, basi tuberculatum ; 2*^*"™. et 3*^™^. parum breviora, 

 illius iatera sulco discreta ; reliqua breviora, transversa : venter 

 carinatus, anus truncatus : valvula segmenti 6''. producta, com- 

 pressa, obtusa, libera : aculeus linearis, corpore plerunque longior, 

 rarius longitudine abdominis : pedes elongati ; postici baud in- 

 crassati ; calcaria plerunque magna : alarum anticarum stigma 

 late ovatum aut ovato-lanceolatum ; areola radialis prope apicem 

 alse clausa, oblongo-ovata, latior quam Subgeneribus VI*°. et 

 V1I'"°. cubitalis 1"'='. sub medio nervum recurrentem excipiens ; 



