6o A't'Ti' Sf'i'cics of Sicrohi. With lixf^himitorx Notes. 



29-24 Clypeal process not spicatc, either spatulate 

 or simple 



30-41 Clvpeal process spatulate. distinctly contract- 

 ed at the base 



3i-,^2 Head considerably longer than wide . 15. citri'iiimitha 



32-31 Head as wide as long or nearly so 



33-36 Vertical margin of tlie head conspicuously 

 concave 



34-35 Vertical emargination deep, head a little 

 wider than long, expanded behind the 

 eyes, clypeal process short 16. riiiari^iuata 



35-34 N'erlical emargination sliallow. head a little 

 longer than wide, clypeal process moder- 

 ately long 17. giffardi 



36-33 Vertical margin of the head straight or near- 

 ly so 



37-38 Head a little longer than wide, width between 

 the eyes onh' slightly exceeding the length 

 from eyes to vertex 18. suttoniae 



,^9< T,/ Head as wide as long, width between the 

 eyes considerably more than the length 

 from eye to vertex 



39-40 Head large, shining black \g. iintiri 



40-39 Head small, brilliant black, length behind the 



eyes not great 20. rocki 



41-30 Clypeus simple, without contraction at the 

 base, either carinate or flat dorsally 



42-59 Clypeus without carina 



43-46 Body particolored 



44-45 Head almost smooth and shining 21. biculor 



45-44 Head coarsely sculptured and dull, opaque or 



nearly so 22. aristotcliar 



46-43 Body entirely black 



47-50 Body thick-set, not slender or depressed 



48-49 Width between the eyes not mttch greater 

 than tlu- kngtli from eye to vertex, tem- 

 ples full 2^^. antliraclna 



49-48 Width l)elween the eyes nearly twice the 

 length from eye to vertex, temples 

 rounded 24. koiuimi 



50-47 Body more or less slender or depressed, not 

 thick-set 



5r-54 Head much longer tlian wide 



52-53 Legs fuscous to black 25. aiigiistata 



53-52 Legs luteous 26. Icz'is 



54-51 Head as wide as long or nearly so 



55-56 Slender, somewhat depressed, head without 

 great depth, antennre short, propodeum 

 smooth 27. brcviconiis 



[6] 



