236 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



at base and broader in front, where they are truncate; labium longer than 

 half the length of maxillae, pointed very sharp at the tip. Abdomen very 

 much geniculate on the dorsal surface by the two hunches and tubercles, 

 nearly triangular; spinnerets long. 



Two specimens from Hermosillo. 



THERIDIID^E. 



91. Theridium tepidariorum Koch. — Two specimens 

 from Hermosillo, and one from Cape Region. Appears to 

 be more uncommon in the tropics than in the temperate 

 regions. 



92. Theridium for dum Keys. — Various specimens; Mt. 

 Orizaba, Sierra San Lazaro, and Tepic. Also known to me 

 from Texas. Closely related to the preceding species, 

 but easily distinguished by its dotted legs. 



93. Theridium studiosum Hentz. — Two examples from 

 Tepic. 



94. Theridium spirale Em. — Two from Tepic. 



95. Theridium frondeum Hentz. — One young specimen 

 from Tepic. 



96. Theridium rufipes Lucas. 



Theridium albonotatum Tacz., Horse Soc. Entom., Ross., T. X., p. 1. 

 Two specimens; Tepic. 



97. Theridium rupicola Em. — Two from Cape Region. 



* 



98. Theridium confraternus, sp. nov. 



Plate XIV, Fig. ii. 



Very similar to T. unimaculatum Em., but no black spot on the cephalo- 

 thorax. The legs are infuscated beyond the femora, and the femora have 



