PTERONUS. 201 



the <£ hypopygiuin at apex emarginate. Sheath 

 small, thickish. 



Crassa (Vol. II, p. 81). 

 Cceruleocarpa (Vol. II, p. 82). 

 Lucida (Vol. II, p. 84). 



Amauronematus, Knw. 



Body large ; the apex of the clypeus incised ; claws 

 bifid at the apex; antennae short, substaceous, usu- 

 ally black ; the stigma elongate, at the base ovate, 

 the apex acuminate; head, mesonotum, and meso- 

 pleurse finely and closely punctured, opaque ; head 

 subtriangular, the labium longly produced. Sheath 

 thick, usually large. 



Histrio (Vol. II, p. 91). 

 Glenelgensis (Vol. II, p. 93). 

 Hsemorrhoidalis (Vol. II, p. 96). 

 Humeralis (Vol. II, p. 96). 

 Arcticus (Vol. II, p. 181). 

 Longiserra (Vol. II, p. 94). 

 Placidus (Vol. II, p. 90). 



Pteronus, Jur. 



Body large, hard ; clypeus incised at the apex ; 

 claws bifid ; antennas long, almost always pale beneath ; 

 stigma of one colour; mesonotum and mesopleura 

 shining, not sometimes sparsely punctured; head sub- 

 rotund ; labium not sometimes slightly, prominent. 

 The eighth dorsal abdominal segment at the apex sub- 

 triangularly produced ; the apex of the hypopygium 

 narrow and subtruncately rounded. Sheath small, 

 slim, the apex never acuminate. 



Bipartitus (Vol. II, p. 176). 

 Togatus (Vol. II, p. 184). 

 Pavidus (Vol. II, p. 171). 



