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



Several from Palo Alto (Baker) and Mt. Shasta 

 (Lembert). 



Theridium fordum Keyserling. Spinn. Amer., Therid. (i) 

 1884, p. 23. 



From Santa Cruz Island, 23 July. 



Theridium calif ornicum n. sp. 



Plate XXXIX, Fig. 34. 



Length ? 2.2 mm., tibia plus patella i 2.8 mm. Cephalothorax, legs, 

 sternum, and mandibles white; abdomen yellow above, with a large, oblong, 

 brown spot reaching from base to near tip, and sometimes containing two 

 yellow spots near the middle, venter pale. Posterior eye-row straight, equal 

 in size, P. M. E. slightly more than their diameter apart, and about as far 

 from the P. S. E., A. M. E. smaller and fully twice their diameter apart, 

 closer to the equal A. S. E., S. E. rather larger; mandibles moderately ver- 

 tical; sternum triangular, rather longer than broad, broadest and truncate in 

 front, truncate behind between the hind coxae; legs long and slender, femur i 

 much longer than the cephalothorax, more than twice as long as femur iii, 

 tibia I shorter than metatarsus i, all clothed with fine hairs and a few slender 

 spines; abdomen plainly longer than broad, rather high and convex; epigy- 

 num shows a dark triangular area, with the angles truncate, and containing 

 two darker roundish spots. 



Two specimens, Mill Valley, Marin County, 30 May 

 (Fuchs). 



Theridium sexpunctatum Eme^-lon. Trans. Conn. Acad. 

 Sci. VI, 1882, p. 12. 



One adult male from Mill Valley, Marin County, May 

 (Fuchs). Not previously recorded from the West 

 Coast, but I have specimens from Washington State. 



Latrodectes mactans Koch. Die Arachn. viii, 1840, p. 115. 



Several specimens from Marin County (Vaslit) ; 

 Fresno County (Bellman) ; Santa Rosa Island (Eisen) ; 

 Mill Valley, Marin County (Fuchs); Claremont; Lake- 

 side; Santa Catalina Island (Baker); Los Angeles 

 (Davidson). 



