174 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ni 



Key to the Ballophiline Genera 



1 rr. Ventral pore fields, at least on anterior third of body, in one or two subcentral 

 areas varying approximately from circular to elliptical. Ultimate leg 

 tarsus consisting of two articles. Antennae clavate or not. Prosternal 

 sclerotic lines present or not :> 



\b. Ventral pore fields, at least on anterior third of body, not in subcentral cir- 

 cular to elliptical areas, rather in posterior bands or diverging lines. 

 Ultimate leg tarsus consisting of one article. Antennae distally not 

 clavate. Prosternal sclerotic lines absent 2 



2a. Each coxopleuron with one pit and associated pore. The more anterior 

 ventral pore fields each appearing as two narrow transverse bands, on 

 rear sternites becoming a single subcentral transverse band. (Venezuela.) 



Koenethmus Chamberlin 



26. P^ach coxopleuron without any pore or pit whatever, and each with no 

 discernible gland. Ventral pore fields of anterior as well as of rear part 

 of body each appearing as a pair of diverging strips or lines, and each 

 consisting of a dozen or fewer pores. (Lesser Antilles.) 



Caritohallex, new genus 



3a. Presternum without or essentially without sclerotic lines. Ventral pore 

 fields of the more anteiior sternites each single 4 



36. Prosternum with complete or virtually complete sclerotic lines. Ventral 

 pore fields of the more anterior sternites each single or double .... o 



4a. Antennae conspicuously clavate, more or less geniculate. (Africa, South 

 America, Asia.) Ballophilus Cook 



46. Antennae not clavate, instead attenuate to a greater or lesser degree. 

 (Antilles, Panama.) See note D, p. 191. 



Taeniolinum Pocock, Leptynophilus Chamberlin 



5a. Anterior body pore fields each double. Antennae very shghtly or not at 

 all clavate <» 



56. Anterior body pore fields each single. Antennae varying from heavily 

 clavate to filiform 7 



6a. Each coxopleuron with one gland and associated pore. Ventral pore fields 

 not raised. (Colombia.) Zygethmus Chamberlin 



66. Each coxopleuron with two glands and associated pores. Ventral pore 

 fields on slight prominences. (Panama, Antilles, South America.) 



Diplethmus Cook 



7a. Each coxopleuron with one gland which is heterogenous or homogenous. 8 



76. Each coxopleuron with two glands and associated pores, the glands heter- 

 ogenous or homogenous 9 



8o. Coxopleural gland composite, i.e., heterogenous, with numerous discernible 

 inclusive glands. (Puerto Rico.) Clavophilus Chamberlin 



86. Coxopleural gland homogenous, i.e., without discernible inclusive glands. 

 (Honduras.) Tanophilus Chamberlin 



9o. Antennae conspicuously clavate and geniculate. Ventral pore fields of 

 anterior sternites circular or else obviously transversely elliptical . . 10 



96. Antennae geniculate but not typically so or decidedly clavate. According 

 to Chamberlin (1941, p. 139): "nearly uniform in diameter from second 

 to eighth articles and then abruptly thickened at the ninth article and 

 from there gradually attenuated to the distal end, the last six articles 

 longer and thicker than the preceding ones." Ventral pore fields circular. 

 (Venezuela.) Carethmus Chamberlin 



