WEST INDIAN CENTIPEDES — CRABILL 173 



With these thoughts in mind one may say that Caritohallex falls 

 within that assemblage of genera whose members all lack typical, 

 conspicuously clavate and geniculate antennae. At present all of 

 these genera seem restricted to the New World tropics and sub tropics: 

 The majority occur in the Caribbean Islands, Central America, and 

 northern South America, i.e., Dlplethmvs, Taeniolinum, Koenethmus, 

 Zygethmus, LeptyiwpMlus , Carethmusi, and Caritohallex. Within 

 this gi'oup the new genus resembles most closelj^ Koenethmus Chamber- 

 lin (1958, p. 59), In both, the antennae are not clavate or geniculate, 

 prostemal sclerotic lines are totally absent, ventral pore fields are not 

 circular or eUiptical, and the ultimate leg tarsus consists of a single 

 article. They difl'er quite significantly in the absence in Caritohallex 

 of any discernible coxopleural pit, gland, or pore. Both the pit and 

 the pore are said to be conspicuous in the Chamberlin genus. Accord- 

 ing to the presently recognized generic system of the subfamily, this 

 distinction is clearlj^ indicative of supraspecific rank. 



Generic diagnosis: Antennae not clavate or attenuate; instead, they 

 are filiform proximally and monihform distaUy. Cephalic plate is 

 subrotund, dorsally somewhat domed; prcbasal plate well exposed. 

 Clypeus much wider than long, with distinct, complete paraclypeal 

 sutures (see note A, p. 189); with a band of coarser, more sclerotized 

 areola tion arching forward anterior to the labrum. Labrum mem- 

 branous, centrally without teeth, laterally with weak membranous 

 to weakly sclerotic teeth. Mandible with indistinctly divided dentate 

 lamella, the row of simple hyaline teeth overlapping the dentate la- 

 mella. First maxillae with two pairs of lappets. Second maxillae 

 medially broadly joined, not suturate; with postmaxillary sclerites 

 (see note B, p. 189) ; telopodite claw pectinate, at least on ventral edge. 

 Prosternum broad, completely bordered by bulging pleura; without 

 subcondylic sclerotic (i.e., chitin) lines. Articles of prehensorial 

 telopodite without denticles; ungula broad, serrulate. Poison gland 

 extending into the prehensorial segment (see note C, p. 190). Tergites 

 not bisulcate. Sternites with double pore fields divergent and linear, 

 not raised. Ultimate pedal segment without discernible coxopleural 

 glands, pits, or pores. Ultimate leg tarsus consisting of one article; 

 pre tarsus represented by a minute acicular bristle. Terminal pores 

 absent. 



Type-species: Caritohallex minyrrhopus, new species (original desig- 

 nation and monotj^pic). 



The following key to the known ballophihne genera should further 

 clarify the identity of Caritohallex: 



