94 CALIFORNIA ACADEMY OF SCIENCES. 



Abdomen elongate, elliptical, segments short of about 

 equal length; each segment with two weak median hairs 

 on dorsal surface ; whole colored dark smoky brown ex- 

 cept tip of ninth segment; broad black lateral bands, 

 connected on each segment by a narrow transverse black 

 bar across middle of segment; on first segment this bar 

 broader, covering nearly whole surface of segment, and 

 with a narrow uncolored median line ; ninth segment trun- 

 cate behind with flatly rounded posterior angles ; a series 

 of short pustulated hairs along posterior margin; genitalia 

 in segments 8 and 9, side pieces with a distinct toothed 

 posterior claw. 



Female, same size; not so dark; ninth segment emar- 

 ginated for one-half its length, the points being obtusely 

 angled, and with one very short hair each. 



Docophorus insolitus n. sp. (Plate iv, fig. 5.) 



A few specimens, male and female, taken from an 

 Aleutian Murrelet, Ptychor ham pus aleuticus (Bay of Mon- 

 terey, California). This species was not found on other 

 of the numerous individuals of the same bird species 

 taken at Monterey. 



Description of female. Body, length 1.65 mm., width 

 .50 mm.; elongate, narrow, Nirmoid in general appear- 

 ance, with long trabecular and distinct clypeal suture; 

 color of head and thorax yellowish brown, abdomen whit- 

 ish, with strongly marked dark brown bands of the head, 

 borders of thorax, and blackish abdominal lateral bands, 

 and brown transverse blotches. 



Head, length .5 mm., width .4 mm.; large in compar- 

 ison with total size of body, the head being nearly one- 

 third of the total body length, elongate conical; that part 

 of the head in front of the mandibles specially long; 

 front broad, convex, with the margin finely crenulate; 

 three small lateral marginal hairs on forehead; trabecular 



