186 ENTOMOLOGICAL NEWS. [October, 



antennal bands of darker brown, anterior ends bending in at the clypeal 

 concavity ending in broad, even blotches, the posterior ends also darker 

 in front of the antennas; dark ocular blotches; mandibles dark brown, 

 showing through the head; an even dark band on the occipital margin 

 and occipital bands distinct posteriorly. 



Prothorax narrow, lateral margin rounding, with one pustulated hair 

 near the lateral margin; dark golden brown lateral blotches widely sepa- 

 rated anteriorly by a paler median space; these dark blotches are inter- 

 rupted laterally by a distinctly paler circular spot; metathorax narrow, 

 sides convex and strongly divergent; seven strong hairs on the first third 

 of the posterior margin, which is obtusely angulated each side of the 

 median line and its median portion is angularly concave upon the abdo- 

 men; general color paler than the prothorax, a darker lateral blotch which 

 is interrupted by a pale space in which the hairs are placed; legs weak, 

 with no distinct markings, a few scattered hairs. 



Abdomen broad, tapering posteriorly but little; angles of the segments 

 not prominent, with a single short hair; few dorsal hairs, but these are 

 more numerous near the lateral half of the segment; last segment long, 

 with a narrow posterior emargination, each side of which are two strong 

 hairs; general color pale golden brown, slightly darker medially; trans- 

 verse blotches of the ventral surface showing through the dorsal surface 

 of segments two to seven; the appendages of segment eight are distinctly 

 darker brown on their tips. 



Male. Body length .93 mm., width .55 mm.; head length .28 mm., 

 width .38 mm. Abdomen more nearly oval than in female; last segment 

 not more than half as wide as the preceding segment, posterior margin 

 nearly straight, with acute lateral angles; genitalia slender, distinctly 

 showing through the body ; in general coloring and markings closely 

 resembling the female. 



Trichodestes calif ornicus n. sp. (Fig 2). 



One female taken from a pocket mouse, Perognathus sp., 

 Baja California. Resembling, in general, T. retusus Witzsche, 

 from a weasel, and T. geomydis Osborn from a pocket gopher, 

 and T. nephilidis Osborn from a polecat. 



Description of female. Body length 1.37 mm., width .84 mm.; short, 

 broad, pale yellowish white, without definite markings, except on the 

 front of head. 



Head length .33 mm., width .5 mm.; anterior margin with a deep in- 

 cision; sides of the front receding rapidly to the sharply angulated tra- 

 beculas; four or five short hairs on the anterior margin and a group of 

 short hairs in front of the indistinct suture; antennae long and large, 

 reaching beyond the temporal margin when extending back; the seg- 

 ments of about equal length, some scattering hairs; eye prominent, with 

 a faint hair; temples rounding with six or seven marginal hairs and spines; 

 occipital margin nearly straight and without hairs or spines; general color 



