15() GEO. H. HORN, M. D. 



not quite all the subdivisions suggested by Chaudoir are represented by 

 genera around which the exotics may be grouped. 



The following table will enable our genera to be recognized : 



Tibial spurs very long. 



Head not constricted ; the tibial spurs finely serrulate. Ungues simple or finely 



serrulate Tetragoiioderiis. 



Head constricted ; til)ial spurs simple. Ungues with long pectination. 



Neiuotarsiis. 

 Tibial spurs short or at most moderate in length. 

 A. — Mandibles with distinct scrobes. 

 A-a. — Antennae with at least three glabrous joints. 



b. — Head constricted behind the eyes liebia. 



bb. — Head not constricted. 

 C.-^Labruni large prominent, covering in great part the mandibles, 

 d.— Antennae with three glabrous joints; middle tibise of male incised within 



near the tip Coptodera. 



dd. — Antennae with four glabrous joints; middle tibiae of male not incised. 



Plildpoxeiia. 

 CC. — Labrum moderate, not large. 

 e. — Tarsi slender, fourth joint entire. 

 f. — Labial palpi slender. 

 g.^-Thorax truncate at base. 



Mentum not toothed, ungues serrate DroiiiiliS. 



Mentum toothed, ungues simple Apristus. 



gg. —Thorax slightly lobed at base, ungues serrate. 



Mentum not toothed Blcclii'US. 



Mentum with a small emarginate tooth ]VIetabletii$«. 



ff. — Labial palpi thick, oval; ungues more or less serrate.... A.^iiiopalpuisi. 

 ee. — Tarsi with the fourth joint emarginate or bilobed. 



h. — Ungues simple Teciiopliilus. 



hh. — Ungues serrate. 

 i. — Mentum not toothed, fourth tarsal joint deeply bilobed. Tarsi hairy above. 



EiiproctiiN. 

 ii. — Mentum toothed. 

 j. — -Thorax truncate at base. 



k. — Tarsi with fourth joint bilobed Callida. 



kk. — Tai'si with fourth joint emarginate. 

 1. — Tarsi not hairy above. 



m. — Last joint of labial palpi more or less triangular or securiform. 

 n. — Thorax with the base oblique each side, the sides narrowly margined. 



Fliilopliiiga. 

 nn. — Thorax with base squarely truncate, the sides rather widely margined 



especially posteriorly PIocUioiiii!!$. 



mm. — Terminal joints of both palpi similar, more or less cylindrical, truncate. 



Fiiiacodera. 

 n. — Tarsi hairy above. Penultimate joint of labial 2)alj)i usually with more 



than two setae Cymindis. 



jj. — Thorax lobed at middle of base. Tarsi hairy above. Last joint of labial 

 paljii securiform Apeiies. 



