172 [August. 



10ff(106)A small or very small species, with very finely punctured mesonotum 

 and red labrum ; 3rd abdominal seo-raent black, in no part con- 

 spicuously red ; wrinkles of the propodeum longitudinal and 

 remote, at most about four on either side of the strong median one, 

 and these ending simply befoie reaching the brow, the anterior area 

 being undefined nu/er v. Hag. 



lOi(lOrt) Some or all of these characters wanting. 



11 (14) Mesonotal punctures strong, deep, not fine, dense, or at least not 



evidently remote, the mandibles always with a lateral tooth before 

 the apex. 



(Species medium-sized to large, but divisiis is very variable, and 

 examples of quite small size are frequent.) 



12 (13) Lateral angles of the pronotum, in dorsal aspect of the insect, more or 



less obtuse or indistinct ; head, viewed from above, wider ; pygidial 

 area extremely wide ; hairs of tlie scape of the antennae longer. 

 .... pclliickhis Sm. (pilifrojis Th.). 



13 (12) Lateral angles of pronotum always distinct and very often decidedly 



prominent; head less wide ; the pygidial area narrower 



.... divisus K. {si7ii{lis 'Wesm.). 



14 (II) Mesonotal punctures in most species fine, often .shallow, and some- 



times quite remote ; if deep, and nut fine, the mandibles are simple, 

 without an anteapical tooth, or the size of the insect is very small. 



15 (18) Mandibles simple. 



16 (17) Species larger and not very narrow in form, tlie face transverse; the 



mesonotum Avith very distinct impressed median line, generally 

 reaching at least to its centre. . pioicticpps Th. 



17 (16) A very small narrow species with subcircular face, the impressed line 



of the mesonotum generally wanting or little developed, the legs 

 usually much paler than in the preceding 



.... lonijidus v. Hag. 



18 (15) Mandibles with a tooth before tlie apex. 



19 (20) A moderately large and robust species, the expanse usually about 



12 n:m. or more, the sculpture of tlie front part of the head along 

 the middle line from the antennae for half the way or more to the 

 anterior ocellus is rough and very obscure without definite punc- 

 tures, or almost so. 



(Mesonotal punctures never very remote.) 



.... ferruf/inatus v. Hag. 



20 (19) Species, except in \exy large examples of some, smaller than the 



preceding, often quite small, ajid the sculpture of the front of the 

 head, in the region above mentioned, consists largely of quite 

 distinct punctures, though these are sometimes very close on the 

 lower part and to some extent confused. 



21 (22) Second abdominal segment almost impunctate, or with hardly visible 



punctures, on its basal portion ; the third also hardly punctured ; 

 posterior (vertical) surface of the propodeum unusually smooth, 

 viewed somewhat from the side its upper part at least has little or 

 no upstanding rugosity, but appears rather to bear some shallow 

 punctures or impressions ; towards the petiole rugosities are often 

 distinct hyalinatMS v. Hag. 



