MILLIPEDS OF MEXICO AND CENTRAL AMERICA 8 1 



Genus TARASCOLUS Chamberlin 1943b, p. 25. 



TYPE SPECIES: Tarascolus bolivari ChamherVm, by original designa- 

 nation. 

 Tarascolus bolivari Chamberlin 1943b, p. 26. 



TYPE: Collection of R. V. Chamberlin. 



TYPE AND PARATYPE LOCALITY: Zita'cuaro, Michoacan, Mexico. 

 Tarascolus clarus Chamberlin 1943b, p. 26. 



TYPE: Collection of R. V. Chamberlin. 



TYPE LOCALITY: Santa Rosa, D. F., Mexico. 



PARATYPE LOCALITIES: Same, and Pedregal de San Angel, Mexico 

 (D. F.?). 



Genus WATICHELUS Chamberlin 1949, p. 169. 



TYPE SPECIES: Onychelus smithi Chamberlin, by original designa- 

 tion. 

 Watichelus cooki Loomis 1949, p. 243. 



TYPE: U.S. Nat. Mus., no. 2516. 



TYPE AND PARATYPE LOCALITY: Descanso, Baja California, 

 Mexico. 

 Watichelus emarginatus Loomis 1949, p. 243. 



TYPE: U.S. Nat. Mus., no. 2515. 



TYPE AND PARATYPE LOCALITY: Eight mi. south of Tijuana, 

 Baja California, Mexico. 



Family MESSICOBOLIDAE New 



When Hoffman and Orcutt 1960 published their synopsis of the family 

 Atopetholidae they excluded three genera that had been associated with 

 it at one time or another. These genera are Anelus, Cyclothyrophorus, 

 and Messicobolus, which they indicated belong in one or more unde- 

 fined spirobolid families. Since then Hoffman has obtained fresh material 

 of Cyclothyrophorus salvini, from Mexico, and has determined that the 

 genus is a true atopetholid. While it is beyond the scope of this check- 

 list to go into the study necessary to determine if the two remaining 

 genera belong in only a single family, these waifs require some assign- 

 ment for inclusion here and the new family Messicobolidae is proposed 

 for them, with Oxobolus Chamberlin 1922 also included. 



This family is characterized as composed of intermediate to rather 

 large size species with anterior plates of the gonopods more or less 

 produced at the mesodistal comers; a short but broad sternum (ventral 

 plate); and short, stout, generally quite simple inner gonopods. 



