350 



Dr. Malcolm Cameron on 



■ — Tarsal formula otherwise 5. 



6. Tarsal formula 4, 4, 5 . . . Bolitocharini. 



— Tarsal formula, 4, 5, 5, 4, 4, 4, or 3, 4, 4 . Myrmedoniint. 



TABLE OF THE GENERA. 



PlESTINI. 



1. Abdomen bordered .... 



— Abdomen not bordered. 



2. Anterior tibiae serrated externally . 



— Anterior tibiae not serrated. 



3. Anterior coxae separated 



— Anterior coxae contiguous 



4. Mandibles much produced, their length 



about twice that of the head; 3rd 

 joint of the maxillary palpi elongate, 

 as long, or nearly as long, as the last . 



— Mandibles not much produced, their 



length at most a little longer than the 

 head; 3rd joint of maxillary palpi 

 broader than long, much shorter than 

 the last ...... 



5. Anterior tibiae with two small spines 



near the apex on the external border . 



— Anterior tibiae without spines on the 



external border. 



6. Abdomen obliquely striolate; posterior 



angles of the thorax somewhat promi- 

 nent ...... 



— Abdomen not striolate, normally punc- 



tured ; posterior angles of the thorax 

 not prominent .... 



Omaliini, 

 1. Labrum emarginate anteriorly; meso- 

 sternum not keeled ; last joint of the 

 maxillary palpi slender, distinctly 

 smaller than the 3rd 



OXYTELINI. 



1. Anterior and middle tibiae spinose 

 externally. 



— Anterior and middle tibiae not spinose 



externally. 



Eleusis Cast. 



2. 



3. 



5. 

 Leptochirus Germ. 



4. 



Borolinus Bernh. 



Priochirus Shp. 

 Ancaeus Fauv. 

 6. 



Holosus Motsch. 



Lispinus Er. 



Phloeonomus Heer. 



