104 THE CANADIAN ENTOMOLOGIST. 



carinse ; pygidium long, lanceolate, broadest at apex, without 



the two pencils of golden hairs Thynnidea, Ashm. 



30. Head seen from above }iot triangular, usually transverse, subtjuadrale 



or obtrapezoidal 31. 



Head seen from above triangular. 



Eyes small, oval, extending to base of mandibles : cly[jeus very 

 short, truncate ; mandibles falcate, pointed at apex ; maxillary 

 palpi 4Jointed ; labial palpi 3-iointed 3 second segment of 

 abdomen with two transverse folds or carinee towards 

 apex Iswaroides, Ashmcad. 



3 I. Pronotum;/^/ quadrate, obtrapezoidal, or wider in front than behind.. 33. 

 Pronotum quadrate, usually, however, a little wider than long, but not 

 wider in front than behind. 



Head not or scarcely wider than the thorax, the latter not 



especially narrow 32. 



Head much wider than the thorax, the latter being very narrow, 

 with the sides parallel ; dorsal abdominal segments i and 2 

 strongly transversely furrowed ; pygidium oval or nearly and 

 longitudinally striate Catocheilus, Guerin. 



32. Clypeus slightly produced, truncate anteriorly, the labrum visible as 

 a narrow transverse line, ciliate ; mandibles narrow, acute at apex ; 

 maxilary palpi 6-jointed, not short; labial palpi 4-jointed. 



(Australia) Entelus, Westwood. 



(Type E. bicolor, VVestw.) 



Clypeus short, broadly truncate anteriorly, but the labrum not visible ; 

 mandibles falcate, rounded at apex; maxillary and labial palpi both 

 4-jointed ; first abdominal segment with a broad, finely shagreened 

 depression at apex, the second segment with two transverse carinae, 

 the intermedian space between the carinse shagreened, opaque ; 

 l)ygidium narrowly compressed towards apex and then abruptly 



dilated or trumpet-shaped Spilothynnus, Ashm. 



2^1- Head large, obtrapezoidal, subquadrate or subglobose, the temples or 

 the space back of the eyes very broad, without furrows or impres- 

 sions extending from the antennae to the vertex 34. 



Head transverse, much wider than thick antero-posteriorly, the 

 temples not especially broad, with sometimes two furrows or 

 impressions extending from antennse to vertex 41 . 



