1915.] Allen, Review of the South American Sciuride. 2ST 
PLAtTH xX. 
All figures nat. size. 
Figs. 1-8. Urosciurus tricolor (Poeppig). No. 19672, Field Mus., Chicago, 
Q ad., Yurimaguas, Peru. 
Figs. 4-6. Urosciurus duida (Allen). Type. No. 36153, Am. Mus., 2? ad., Rio 
Cunucunumé, base of Mt. Duida, Venezuela. 
PLATE XI. 
Figs. 1-3. Urvrosciurus pyrrhonotus pyrrhonotus (Wagner). No. 37076, Am. 
Mus., co ad., Calama, lower Rio Madeira, Brazil. 
Figs. 4-6. Urosciurus langsdorffiit langsdorfit (Brandt). No. 4837, Mus. 
Acad. Nat. Sci. Philadelphia, o ad., Chapada, Matto Grosso, Brazil. 
Puate XII. 
Figs. 1-3. Simosciurus stramineus stramineus (Eydoux and Souleyet). No. 
34687, Am. Mus., & ad., Daule, Ecuador. 
Figs. 4-6. Hadrauccien flammifer (Thomas). No. 17562, Am. Mus., o& ad., 
La Union, Venezuela. 
Puate XIII. 
All figures 3. 
Fig. 1. Nannosciurus whiteheadi Thomas. No. 34687, Am. Mus., @ ad., Sara- 
wak, Borneo. Direct crown view of maxillary toothrows. 
Fig. 2. Same specimen as Fig.1. Oblique view of left maxillary toothrow. 
Fig. 3. Microsciurus similis similis (Nelson). No. 32499, Am. Mus., 9 ad., 
Cocal, Western Andes, Colombia. Direct crown view of maxillary toothrows. 
Fig. 4. Same specimen as Fig. 3. Oblique view of left maxillary toothrow. 
Fig. 5. Leptosciurus pucheranit pucherannitt (Fitzinger). No. 32839, Am. Mus., 
¢' ad., near Bogotdé, Colombia. Direct crown view of maxillary toothrows. 
Fig. 6. Same specimen as Fig. 5. Oblique view of left maxillary toothrow. 
Fig. 7. Leptosciurus ignitus ignitus (Gray). No. 1253, Am. Mus., Yungas, 
Bolivia. Direct crown view of left maxillary toothrow. 
Fig. 8. Samespecimenas Fig.7. Oblique view of left upper maxillary toothrow. | 
Fig. 9. Leptosciurus leucogaster (Gray). Collector’s No. 448, Carnegie Mus., 
Pittsburgh, ? ad., Prov. del Sera, Bolivia. Direct crown view of left maxillary 
toothrow. 
Fig. 10. Same specimen as Fig. 9, Oblique view of left maxillary toothrow. 
Fig. 11. Mesosciurus hoffmannt hoffmanni (Peters). No. 18094, Am. Mus., 
og ad., Mt. Irazi, Costa Rica. Direct crown view of maxillary toothrows. 
