496 CALIFORNIA ACADEMY OF SCIENCES. 



Abdomen elongate, subparallel- sided, with posterior 

 angles of segments projecting slightly, pointing backward 

 and each bearing two weak hairs ; dorsal surface of seg- 

 ments naked; last segment projecting, parabolic behind, 

 with two pairs of long weak hairs and one pair of shorter 

 ones; lateral bands narrow, distinct, black, interrupted, 

 the anterior end of each segmental portion projecting 

 beyond the suture and slightly inward; large median 

 chestnut brown blotches on segments 1-7, each of these 

 blotches (except that on segment 1) nearly crossed by a 

 transverse linear uncolored space; on segments 6-7 the 

 uncolored space is divided into two portions; in addition 

 there are on segments 3-7 a pair of transversal dark 

 brown lines, one on each side of the median line and 

 lying superposed on median blotch, but extending a little 

 farther laterally than the lateral margin of the blotch; 

 some of these markings are on the ventral surface, but 

 show through distinctly; segment 8 has a median blotch 

 and two lateral markings composed of a brown line de- 

 fining an elongate curving triangle, uncolored within; 

 segment 9 has a median blotch and from its posterior 

 margin two anteriorly projecting lines; distinct, slender, 

 curving side pieces of genitalia limited to segment 8. 



Nirmus vulgatus n. sp. (Plate lxvii, fig. 5.) 



This small Nirmus of Piaget's group mterruptofasciati 

 is rather common on Passerine birds. I have taken it 

 from the California Purple Finch, Carfodacus jmrpureus 

 calif ornicus; the House Finch, Carpodacus mexicanus 

 frontalis; the Golden-crowned Sparrow, Zonotrichia 

 coronata; Gambel's Sparrow, Zonotrichia gambeli; the 

 Spurred Towhee, Pipiio maculatus megalonyx; the Cali- 

 fornia Towhee, Pipiio fuse/is crissalis; all from Palo Alto, 

 California; and from the Slate-colored Junco, Junco 



