CLASSIFICATION OF THE BEKS. 75 



Mandibles long, rostriform or subrostriform, at apex forcipate; maxillary 

 palpi rather long; metathorax with its basal area opaque or nearly ; 

 labrum with two fascicles of black or rufous hairs (one on each side), 

 which project from under the clypeus ; % with the antenna} short, the 

 sixth dorsal abdominal segment laterally entire, not sinuate, and with 

 no sinus or incision at apex, the pygidium trapezoidal about twice as 

 wide as long, the apex with only a slight emargination, never deeply 



emarginate Melanosmia Schmiedek 



Mandibles not long rostriform, very broad, 4-dentate, and usually with 

 some rufous hairs above towards apex : maxillary palpi short; clypeus 

 with a median production anteriorly; % with the antenna? shorter 

 than the thorax, the sixth dorsal abdominal segment laterally some- 

 times sinuate, but not toothed, the pygidium deeply emarginate at 



„___. Osiuia Panzer = Chalcosmia Schmiedek. 



8 Mandibles obtuse or 4-dentate; body black, densely pubescent; 9 with the 

 antennae short, the flagellum compressed or subcompressed. 

 % with the antennae very short, compressed and much dilated towards the 

 base the third ventral segment armed with a long spine, the pygidium 



, . Arctosmia Schmiedek. 



quadrate 



£ with the pygidium entire; mandibles 4-dentate, forcipate; body blue- 

 black or aeneous black, with fulvous pubescence. 



Acerotosinia Schmiedek. 



8i Mandibles iu both sexes 3-dentate, the apical tooth acute; clypeus slightly 

 produced anteriorly and squarely truncate; maxillary palpi short ; body 

 metallic or at least submetallic; anterior tibial hook distinct, acute ; 

 % with 'the sixth dorsal abdominal segment laterally most frequently 

 sinuate but not toothed, with a slight or distinct median emargination 

 apically, the pygidium deeply semi-circularly emarginate, bidentate.. 

 Nothosmia Ashm. n. g. (Type 0. distmcta Cr.). 

 9. Mandibles differently shaped, not subrogate; maxillary palpi short, the last 



joint minute, subobsolete * " " " " " . ' 



Mandibles subrostrate, forcipate; maxillary palpi rather long; body black, 

 subaeneous, and more or less densely pubescent, the abdomen fasciate 

 metathoracic basal area opaque ; scopa in ? rufous; % with the sixth 

 dorsal abdominal segment at apex emarginate and laterally deeply 

 sinuate and dentate, the pygidium bidentate. 



Amblys Klug = Helicosmia Thorns. (Type 0. bicornts L. i. 

 10. Abdomen black or metallic, never rufous; ventral scopa in ? white, or more 



rarely ru fous ..•••• • 



Abdomen rufous or rufous and black, punctate ; ventral scopa m ? white oi 

 fulvous; pygidium in % bilobed. 



Pseudosmia Eadoszk. = Erythrosmia Schmiedek. 

 II Axilla, posteriorly normal, not produced into a spine; occipital margin not 



acutely rimmed ; ventral scopa in ? white or rufous -1 



^xill* produced into acute teeth posteriorly, which extend beyond the port- 

 scutellum- anterior tibial hooks wanting; occipital margin superiorly 

 acutely margined : ventral scopa in ? rufous; % with the sixth dorsal 

 abdominal segment at apex serrated, the first or second ventral segment 



. , Hoi>lo*niia Thorns. 



sometimes spined * 



JUNE, 1899. 

 TRANS. AM. ENT. SOC. XXVI. 



