Proceedings of 

 the United States 

 National Museum 



SMITHSONIAN INSTITUTION . WASHINGTON, D.C. 



Volume 124 1967 Number 3632 



Two New Species of Cartwrightia 



from Central and South America 



(Coleoptera: Scarabaeidae: Aphodiinae) 



By Oscar L. Cartwright 

 Curator, Division of Coleoptera 



The genus Cartwrightia, described by Federico Islas S. in 1958 for 

 a single Mexican species, superfically appears most closely allied to 

 Rhyparus in the tribe Rhyparina but actually will fall in the tribe 

 Eupariina as now defined. The species are myrmecophilous as are those 

 of Euparia, Euparixia, Myrmecaphodius, and some others of the Eu- 

 pariina. One of the two new species described below was collected in a 

 detritus cavity six to eight feet deep in the nest of a leaf-cutting ant, 

 Atta cephalotes (L.). Euparixia have been taken as deep as 12 feet 

 below the surface in Atta nests. 



The species of Cartwrightia (so beautifully shown in the plates by 

 Mrs. Elsie Froeschner, our staff artist) have a very distinctive habitus 

 not duplicated in any other genus. The depressions of the pronotum 

 and the two large bulbous formations at the apices of the elytra are 

 unique. 



The first Mexican species is redescribed for the benefit of non- 

 Spanish readers and because a few additional characters may help in 

 its determination. The original description was in Spanish. 



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