BY ROWLAND E. TURNEK. 87 



a 7 . Head narrowed posteriorly. 

 a 8 . Pronotum broader than long, maculatus Guer. 85 

 b 8 . Pronotum longer than broad, laevifrons Sm. 101 

 b 7 . Head broad and rounded. luctuosus Sm. 



6 6 . Pronotum without a sulcus. 



a 7 . Head strongly narrowed posteriorly. 



medius Sm. 88 



b 7 . Head broad and rounded. rotundiceps Sm. 89 



b 2 . Pronotum with a median carina. sannce. 69 



B. Tarsal ungues simple. 



a. Epipygium not contracted. 

 a 2 . Pygidium not truncate. 



a 3 . Anterior angles of the pronotum tuberculate. 



polilus. 14 



b 3 . Anterior angles of the pronotum not tuberculate. 



femoratus. 16 



b 2 , Pygidium vertically truncate. 

 a 3 . Pygidium half as long again as broad. xanthorrhoei Sm. 20 

 6 s . Pygidium more than twice as long as b.xoad. 



marginalis Westw. 22 



b. Epipygium contracted. 



a 2 Epipygium recurved at the apex. 



a 3 . Pronotum slightly raised in the middle of the anterior 



margin. Jlavescens Sm. 25 



b 3 . Pronotum not raised on the anterior margin. 



carinatus Sm. 24 

 b 2 . Epipygium not recurved at the apex. 

 a 3 . Pronotum without a carina or tubercle. 

 a 4 ; Pronotum as long as broad. 

 a 5 . Pronotum with a deep median sulcus on the anterior 



margin. wextwoodi Guer. 28 



b 5 . Pronotum without a sulcus. 



a 6 . Median segment strongly punctured, beairix. 39 



6 6 . Median segment almost smooth; the angles of 

 the pronotum prominent. 

 a 7 . Head strongly narrowed posteriorly. 



pulcherrimus 30 

 b 7 . Head rounded. generosus 37 



6 4 . Pronotum much broader than long. 



a 5 . The raised carina before the apex of the first 

 abdominal segment not emarginate. 

 a 6 . Pronotum not flattened. 



a 7 . Pronotum with a median sulcus on the anterior 

 margin. 



