518 CALIFORNIA ACADEMY OF SCIENCES. 



on segments 1-7 a pale brown median blotch, the blotches 

 on segments 4-5 being larger; vulva convex. 



Physostomum diffusum n. sp. (Plate lxx, fig. 3.) 



One female taken on the Sandwich Sparrow, Passer- 

 c ul 'us sandvicensis, and several males and females taken 

 on the Golden Crown Sparrow, Zonotrichia coronata 

 (near Stanford University, Calif.) ; also two females and 

 a young specimen (variety pallidum Kellogg) from a 

 J unco sp. (Lawrence, Kansas). This species differs 

 from the preceding two species described in having the 

 lateral abdominal bands distinctly marginal (as is the case 

 with the species of Piaget, Nitzsch, and Denny), and in 

 this it resembles the European species. It has the very 

 long, backward-projecting, occipital angles, as in angu- 

 latum and australe, which is a character shown by but 

 few of the European forms. 



Description of female. Body, length 4 mm., width 

 1.09 mm.; white, with dark brown to black marginal 

 lateral bands on abdomen and thorax, and few black 

 head-markings ; the labral lobes large and projecting. 



Head, length .8 mm., width .7 mm.; front rather broad, 

 flatly convex, without marginal hairs, sides nearly straight 

 but slightly constricted even with the projecting labral 

 lobes; a single projecting submarginal hair near middle 

 of head, with a very short hair barely reaching margin 

 close to it; in the small ocular emargination several short 

 hairs; occipital angles acute, with two long hairs; the 

 palpi barely project beyond the lateral margin of the head 

 but the labral lobes are large and project conspicuously 

 beyond the margin ; markings consisting of a small black 

 ocular fleck, a dark brown blotch on inner margin of 

 antennal fossa, and in front of it two smaller blotches, 

 the anterior the least distinct; a narrow, interrupted, 



