122 CALIFORNIA ACADEMY OF SCIENCES. 



Description of female. Body, length 2.1 mm., width 

 .35 mm.; slender, parallel-sided, strongly marked with 

 brown and black in regular blotches and bands. 



Head, length .5 mm., width .32 mm.; elongate conical 

 with narrowly rounding or parabolic front; a weakly pro- 

 jecting very obtuse angle at suture; six marginal hairs, 

 of which four are grouped about this angle ; trabecular 

 small but distinct; temporal margins with one hair; oc- 

 cipital margin concave; antennae uncolored; segments 

 1-4, beginning with 1, gradually shorter, fifth segment as 

 long as second; signature broad, paler in front and with 

 indistinct transverse striog parallel with anterior margin, 

 posterior margin concave, and with a broad, uncolored 

 median line running from this border nearly to anterior 

 margin ; the signature is thus almost divided longitudi- 

 nally; antennal bands black, extending anteriorly and 

 fading into the paler color of the signature; temporal 

 margins unevenly bordered with blackish, and bearing 

 one hair; an acorn-shaped occipital signature indistinctly 

 showing through from under surface. 



Prothorax almost square, with posterior margin slightly 

 angulated on the metathorax; clear smoky brown in mid- 

 dle, with black lateral borders expanded in anterior an- 

 gles. Metathorax longer than broad, sides diverging 

 slightly, anterior angles diagonally truncated with a dis- 

 tinct lateral angle; posterior margin straight; four hairs 

 in posterior angle, three of which are in a clear space. 

 Legs pale with smoky brown to black markings. 



Abdomen slender, subparallel-sided, with single hairs 

 at posterior angles, longer on posterior segments; seg- 

 ments 1-2 longest; others successively shorter; segment 

 9 deeply angularly emarginated, the points acute; first 

 and ninth segments wholly colored; others, except seg- 

 ment 8 which has a curving, transverse band extending 



