418 Pomona College Journal ok Entomology 



rows behind, and on lateral edge; abdomen with connecting ridges, which 

 form five longitudinal rows of areas, from the connections of the median 

 row there are slight tubercles; around hind border is a row of rather clavate 

 tubercles, and the posterior slope of abdomen is transversely roughened, legs 

 roughened, the trochanters not so much as in O. rugosa; large processes at 

 tip of coxae III and IV as in 0. rugosa; venter also roughened as in O. rugosa. 

 From Humboldt County, Calif., June 24, and Mt. Wilson, Sept. (Bradley) 

 kindly given me by Prof. J. H. Comstock. 



Ortholasma rugosa Bks. 



Cephalothorax with a pair of spines on each side of anterior margin ; pro- 

 jection of eye-tubercle spatulate; dorsal surface with intersecting ridges which 

 give rise to tubercles and processes ; on the posterior margin is a row of 

 simple spines, the larger ones near the middle ; the coxae and trochanters 

 roughened. Common in Southern Calif., Claremont; San Diego, Los Angeles, 

 and Alameda Counties. 



Dendrolasma 



But one species is described. 



Figure 150. Dendrolasma mirabilis. 



Dendrolasma mirabilis Bks. 

 Cephalothorax has a single clavate process each side on anterior margin ; 

 projection of eye-tubercle is branched ; the dorsum has intersecting lines rorm- 

 ing a definite pattern ; on posterior margin is a row of clavate processes, each 

 with a slight basal projection on each side ; coxae and trochanters roughened, 

 on coxae I and II at tip is a connected row of tubercles, and on coxae II one 

 of these tubercles is greatly enlarged. From Coulterville, Mariposa County ; 

 also Washington. (Fig. 150). 



