42 CALIFORNIA ACADEMY OF SCIENCES. 



borders and indistinct lines caused by the sternal mark- 

 ings showing through. Metathorax pentagonal, pos- 

 terior margin straight, with four longish hairs and a 

 spine (between the first two) on each lateral half; the 

 posterior angles with two spines; color whitish with 

 dark brown anterior angles, and sternal markings in- 

 distinctly showing through. Legs concolorous with 

 thorax, with brownish and blackish markings. Sternal 

 markings distinct, blackish brown, consisting of a 

 median wedge-shaped blotch on prosternum connected 

 by lateral processes with the intercoxal lines; a pecu- 

 liar four-appendaged blotch on mesosternum composed 

 of median blotch and meso-peri-coxal lines; and a pale 

 median metasternal blotch with darker intercoxal lines. 



Abdomen short, broadly elliptical, not turbinated; 

 two or three distinct spines in posterior angles of seg- 

 ments; longish hairs in the angles and on the dorsal 

 surface; segment 1 large; segments 2 and 3 not so 

 large but larger than segments 4-7; segment 8 larger 

 than segment 2 or segment 3; broad blackish brown 

 lateral bands with the sutures distinct; no transverse 

 bands on dorsal surface, but those of ventral surface 

 showing through; these transversal bands arranged as 

 follows: a single broad band covering all of segment 1 

 and anterior half of segment 2, narrow bands on seg- 

 ments 3-7, and one continuous band or blotch covering 

 all of segments 8 and 9; the genitalia strongly chitin- 

 ized, conspicuous, and extending through segments 2-9; 

 last segment rounded behind, with a few short hairs; 

 on the ventral surface of segment 2, a group of four very 

 strong, long spines near each posterior angle. 



Female. Body, length 1.56 mm., width .66 mm.; 

 head, length .34 mm.; width .5 mm.; abdomen more 

 elongate and the segments differently shaped; segment 



