68 CALIFORNIA ACADEMY OF SCIENCES. 



constriction near the anterior margin; posterior angles 

 rounding; posterior margin extending back beyond the 

 mandibles in a dark, narrow point; antennal bands 

 marginal, narrow, dark chestnut-brown, interrupted by 

 the distinct suture, bending in to meet the anterior 

 ends of the occipital bands in an indefinite, pale ful- 

 vous band; temples bordered anteriorly with a narrow 

 border of dark chestnut; occipital bands narrow but 

 distinct posteriorly, widely diverging and apparently 

 connecting with the antennal bands. 



Prothorax narrow, about half as wide as the head, 

 lateral margin convex, one long pustulated hair in the 

 posterior angles; a narrow lateral border of dark chest- 

 nut-brown. Metathorax with sides convex and strongly 

 diverging; a series of long pustulated hairs on the pos- 

 terior margin which is obtusely angled on the abdomen; 

 lateral margin bordered with dark chestnut-brown. 

 Legs fuscous, with dark fuscous borders and semiannu- 

 lations; third pair of legs conspicuously large; a few 

 scattered hairs and spines. 



Abdomen broadly ovoid, short in comparison with 

 the large head; first three segments longer than the 

 others, their posterior margins more nearly straight; 

 segments 4 to 8 narrowed, especially in the middle; last 

 segment narrowly emarginate; many long pustulated 

 hairs on the abdomen arranged in series on the poste- 

 rior margin of each segment, especially thick along the 

 middle; three or four short prickles on the lateral mar- 

 gin of the emargination of the last segment; first four 

 segments dark chestnut-brown, segments 5 to 9 paler 

 fuscous. 



Male, Body, length 1.46 mm., width .53 mm.; head, 

 length .53 mm., width .5 mm.; last abdominal segment 

 rounded, with a fringe of about ten rather long weak 

 hairs. 



