noLCOMYii:\iEx. 281 



rounded ; niaudibles very tliick and massive, much curved, the 

 masticator}- margin obtuse, indistinctly dentate ; clypens narrow, 

 produced posteriorly between the bases of the antenna; and rounded, 

 anteriorly more or less irregular, transverse, with a carina on each side 

 of a medial portion, the carinte projecting and ending in blunt teeth ; 

 antennal cariniu short, wide apart, prominent ; antennae 12-joiuted, 

 the club of the flagellum indistinct, formed of the apical three 

 joints ; eyes rather small, circular, lateral, ])liiced below the middle, 

 line of th(^ head. Thorax massive, the pro-mesonotum forming- 

 one somewhat raised convexity ; pro-mesonotal suture obsolete ; 

 meso-metanotal suture distinct ; the thorax in profile slightly 

 emarginate at the suture; metanotum compai'atively long, the 

 basal portion level and slightly flat above, the posterior lateral 

 angles subtuberculate. the sides finely longitudinally carinate ; the 

 apex obliquely truncate ; legs somewhat short and slender, the 

 spur on the posterior tibiix; simple. Pedicel : the 1st node 

 petiolate in front, viewed in profile higher than the 2nd, sub- 

 triangular, conical and rounded at the top ; 2nd subglobose, as broad 

 as long, attached to the abdomen by the whole of its posterior 

 face; abdomen broad, rather flat, truncate anteriorly, the 1st 

 segment covering more than half the whole length. 



^ mill. Very similar, smaller, with proportionately a much 

 smaller head, the mandibles not so thick and massive, tridentate. 



5 . Very large ; head not enlarged, proportionately shorter and 

 broader, without the mandibles broader than long; mandibles, 

 clypeus, antennal carina^, and antenna; as in the ^ waj. • ocelli 

 present. Thorax massive ; pronotum vertical, suppressed under- 

 neath the long, broad, somewhat gibbous mesonotum ; scutellum 

 large, rounded posteriorly ; tlie basal portion of metanotum very 

 short and sloping, but distinct, apical portion truncate ; legs as in 

 the ^ 5»o7- ; wings broad and ample, fore wing with one long 

 cubital and one short nearly square discoidal cell. Pedicel as in 

 the ^ maj. ; abdomen rather massive, about two and a half times 

 as long as broad and slightly truncate, anteriorly rounded and 

 convex above. 



(S . Head ver}' small, e}'es and ocelli very large and prominent ; 

 mandibles broad, triangular, with a distinct dentate masticatory 

 margin, clypeus obscurely bicarinate ; antenna; ]3-jointed, the 

 scape very short, shorter than the 2nd joint of the flagellum. 

 Thorax massive, smaller than but similar to that of the 5 '■< 

 metanotum longer, th(; apex subconcave : legs and wings as in 

 the $. Pedicel similar 1o that of the $ ; abdomen narrower, 

 posteriorly subacute. 



The species of this g(;nus are vegetarians and harvesters, like 

 the species of 2I('6-sor, to which they are very closely allied. 

 B. criniceps was fairly common in the Pegu Yoma in EurnKi, and 

 one very populous nest, which was close to some ])addy-fields near 

 a Forest reserve. I had under observation, ofl' aiul on, for over two 

 years. Rognlarly beaten tracks radiated from it to the paddy- 



