208 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D See. 



Tepic, Orizaba, Mazatlan, Vera Cruz, Minititlan, Guay- 

 mas, Motzoronga Hermosillo, and San Miguel de Horcasitas 

 are in Mexico, Guaymas, Hermosillo, and San Miguel de 

 Horcasitas being in the Sonoran region. 



THERAPHOSID.E. 



1. Eurypelma caniceps Sim. — One female, probably this 

 species, which was described from a male; Tepic, Oct. 



2. Eurypelma rusticum Sim.— Several from San Jose 

 del Cabo. 



3. Eurypelma helluo Sim. — Two examples from So- 

 nora. 



4. Pachylomerus pustulosus Becker. — Several from San 

 Jose del Cabo. 



5. Entychides dugesii Sim. — One specimen from San 

 Jose' del Cabo. 



6. Evagrus mexicanus Auss. — A number from Tepic, 

 Oct. and Nov., and Sierra San Lazaro, Sept. In all speci- 

 mens the maxillae are pale on the inner margin. I doubt if 

 E. rubrigularis is anything different. 



FILISTATID^E. 



7. Filistata hibernalis Hentz. — Many specimens; San 

 Jose del Cabo, Sierra San Lazaro, Sept., San Miguel de 

 Horcasitas, Guaymas, and Tepic. 



PLECTREURID^E. 



8. Plectreurys castanea Sim. — Several from San Jose 

 del Cabo. 



9. Plectreurys bicolor, sp. nov. 



Plate XIII, Fig. 9. 



Length S 7 mm. Cephalothorax and sternum rufous; mandibles more 

 brownish; legs reddish yellow, brownish on apical half of femora; abdomen 



