306 BULLETIN UNITED STATES GEOLOGICAL SURVEY. [FoI.VL 



Of Central and South America : 



1. aureigaster, G. Cut. 4. deppii, Peters. 



2. cestuans, L. (type). 5. clirysurus, Pucli. 



3. hoffinanni, Peters. 6. pusillus, E. Geoff. 



K. Head lengthened ; pelage coarse and stiff, scanty on the under 

 parts ; tail lengthened, rounded, rather slender in most species. Molars 

 f . Of medium size. — Subgenus Echinosciukus, Trt., 1880. 



Of Central and South America : 



1. variaUUs, Is. Geoffr. 3. hypopi/rrhus, Wagl. (type). 



. 2. stramineus, Eyd. & SouL 



"L. Head lengthened; tail very short, slender, not more than § as 

 long as the body. ♦ Molars f, the first small and often caducous. A 

 narrow dark stripe on the flanks. Of small size. — Subgenus Tamia- 

 sciUEUS, Trt., 1880. 



One Xorth American species: 



1. hudsonius, Pall. 



III. — African Squirrels. 



m. Head oval, the front flat; muzzle short, the parietals inflated; tail 

 cylindric and scant-haired, as long as or longer than the body. Mo- 

 lars i. Of medium or small size.— Subgenus Heliosciurus, Trt., 1880 



1. stangeri, Waterli (callmrus, Buch). 9. hongensia, Heugl. 



2. gamlnanus, Ogilby (rtifoirachiatiis, 10. ocliraceus, Hnet, 1880. 



Waterli;; maculatus et punctatus, 11. ])oensis, Smith {olivaceus, M.-Edw.) 



Temm). 12. auMnni, Gray. 



3. palliatus, Peters. 13. musculirms, Temm. 



4. annulatus, Desm.(type). 14. aubryi, A. M.-Edw. 



5. multicolor, Eiipp. (ce^jopi, Smith). 15. slmrpii, Gray. 



6. abyssinicus (Gm.), Pr^v. 16. pumilio, Le C. 



7. pyrrhopus, £. Geoff. & F. Cuv. 17. Immuius, Du Chaillu. 



8. erythrogenys, Waterh. 



riT. Head short, oval ; tail bushy, longer than the body ; pelage very 

 soft and abundant, striped lengthwise on the back as in Funambulus. 

 Molars — ? Of medium size.— Subgenus FuNisciURUS, Trt., 1880. 



One West African species : 



1. lemniscaius, Le C. {isabella, Gray). 



0. Head oval, lengthened; tail longer than head and body, generally 

 well haired, distichous (at least during the rut) ; pelage harsh, dry, and 

 brittle, often scattering on the belly, which is almost nude. Molars f . 

 Of medium size. — Subgenus Spermosciurus, Less., 1836 (emend. Trt., 

 1880). 



Of Africa and Southwestern Asia : 



1. gongicus, Kuhl, (type). 3. getulus, Jj. {trivittatus, Graj.) 



2. JiavivitUs, Peters. 4. syriaous, H. & E. (fulvus, Blanf ) 



