Nczc Species of Sierola, With Explanatory Notes. 6i 



56-55 Not noticeably depressed, head tumid be- 

 neath, propodeum rugulose 



57-58 Head as wide as long, depth at least two 

 thirds the length, gula protuberant behind 

 and divided into two lobes with a sulcus 

 between, mandibles long and slender 28. montana 



58-57 Head longer than wide, depth less than two- 

 thirds the length, gula not protuberant, 

 mandibles stout, bent in the middle, dis- 

 tal portion twisted and flattened 29. pclcana 



59-42 Clypeus carinate 



60-89 Large forms, 3 mms. or more in length 



61-70 Head considerably longer than wide 



62-65 Long, slender forms, body a little depressed 



63-64 Width between the eyes considerably more 

 than the length from eye to vertex, head 

 tumid beneath 30. kaala 



64-63 Width between the eyes equalling the length 



from eye to vertex, head convex beneath 31. iishata 



65-62 Thick-set forms, the body not depressed 



66-69 Shining black 



67-68 Legs fuscous to black, mandibles concavo- 

 convex, wings witli faint yellowish-brown 

 pigmentation 32. carinata 



68-67 Legs yellowish-brown, mandibles bent at the 

 middle, distal portion flattened, wings 

 hyaline ;i^. koa 



69-66 Dull black 34. l>Uosa 



70-61 Head not much, if any, longer than wide 



71-84 Head a little longer than wide 



72-~T, Body somewhat depressed, mandibles abnor- 

 mally large 35. megalognatha 



7^-72 Body thick-set, mandibles normal 



74-79 Shining black 



75-76 Antenns no longer than tlie head, width be- 

 tween the eyes equalling length from eye 

 to vertex 36. tantalca 



76-75 Antennae longer than the head, width between 

 the eyes greater than the length from eye 

 to vertex 



77-78 Antennal segments considerably longer than 

 wide, punctuation of the head coarse and 

 irregular, propodeum coarsely rugulose 37. compacta 



7^-77 Antennal segments only a little longer tlian 

 wide, punctuation of the head finer and 

 more regular than in compacta, propo- 

 deum with a fine surface sculpture 38. osbonii 



79-74 Dull black 



80-81 Wings with a fuscous pigmentation 39. fitscipcjiiiis 



