334 BRACIIELYTRA — PROTEINIDAE. 



straight ; abdomen entirely reddish-yellow. L. 1 1. Com- 

 mon. A. ojjhthalmicum, Payk. 



b. Thorax diffasely punctured. 



I, Metasternum black. 



Elytra about double as long as thorax, apical margin 

 straight ; abdomen of male black, of female red, black- 

 brown before apex. L. f 1. Common. 



A. torquatnm, Marsh. 



II, Metasternum reddish-yellow. 



Elytra rather more than double as long as thorax, apical 

 margin slightly rounded ; abdomen of male blackish, with 

 brownish apex. L. J 1. Common. A. sorhi, Gyll. 



I'M OTEINIDAB, 



A, Forehead without any ocellum. 



a. Antennae with last three joints larger than rest ; 

 posterior angles of thorax entire. 



Maxillary lobes about equal; third joint of maxillary 

 palpi distinctly narrower and rather shorter than second, 

 fourth only half as broad as third and distinctly as long as 

 second and third together. Frotcinus, Latr. 



b. Antennae with only last joint larger than rest ; pos- 

 terior angles of thorax emarginate. 



Outer maxillary lobe much larger than inner ; third 

 joint of maxillary palpi scarcely narrower or shorter than 

 second, fourth as wide as third and nearly as long as second 

 and third together. Megarthrus, Kirby. 



li. Forehead with one ocellum. 



Antennae with last three joints somewhat thickened, 

 apical one strong. Outer maxillary lobe strongly dilated 

 beyond middle on outer-side ; joints of maxillary palpi 

 gradually narrower, second and fourth about equal in length, 

 third shorter. Phloeohium, Er. 



Protcinns, 



A, Length | — 1 line. 



a. Antennae entirely pitch-brown. 



Similar to P. hrachz/pterus, but with shorter thorax a nd 



