130 



roiiFicrLiD.D. 



families, but is provided with a long narrow lobe, which is prodaeed 

 beneath the third segment. In the following subfamily, the Forji- 

 culino', the second tarsal segment is also lobed, but in a totally 

 diilerent manner, being broad and dilated on each side, and not 

 produced beneath the third segment. In the Chelisochina' this 

 character is not visible from above, as the tarsus is uniformly 

 narrow, but can only be distinguished from the side, and in the 

 smaller species the lobe is often marked by a dense pubescence. 



The Chelisochina' are, as a rule, moderately sized insects, but 

 some forms are quite large. 



There are two general types of coloration : Proreus and Hamaxas 

 are generally brown or reddish, varied \'\ith black, while Cheli- 

 soches, Chelisochella, Exijiinns, and AdiatheUis are black or dark 

 brown, often with a metallic lustre which is sometimes veiy 

 brilliant. 



TaUe of Genera. 



1. Elytra with a sharp keel running from 



theslioulder to the apex; (legs long- and [p. 131. 



slender ; elytra broad and rounded) . . Chelisochella, Verb., 

 1.1. Keel of elytra absent or present only at 

 shoulder, dying out long before reach- 

 ing the apex. 

 2. Tibife flattened and furrowed above in 

 the apical half. 

 3. Tarsi and tibia3 long and slender: 



(elytra and wings metallic) .... ExYPNrs, Burr, p. 132. 

 3.3. Tarsi and tibiiB short. 



4. Antennae with fourth segment 



clubbed or conical ; (medium- [p. 134. 



sized and dark species) Chelisoches, Scudd., 



4.4. Antennfe with fourth segment 



cylindrical or ovate ; (size 



medium or small ; brown or 



reddish). 



5. Wings deA'eloped ; abdomen 



rather depressed and dilated ; 



forceps depressed and strongly 



toothed ; elytra not excavate 



at basal angle n reus, Burr, p. 136. 



5.5. Wings abortive ; abdomen cy- 

 lindrical ; elytra rounded off 

 at basal angle, exposing a 

 small scutellum ; forceps long 



and very slender SoLENOSOMA,Burr, p.l40. 



2.2. Tibife smooth above, not furrowed, 

 flattened only at the apex itself. 

 3. Stout insects, dark or metallic in 

 colour ; pronotum trapezoidal, 



widened posteriorly ADiATHETTJS,Burr,p.l41. 



3.3. Weaker insects ; colour never me- 

 tallic ; forceps rather slender ; 

 pronotum ovate, not widened 

 posteriorly Hamaxas, Burr, p. 147. 



