104 CALIFORNIA ACADEMY OF SCIENCES. 



rangular with lateral margins diverging slightly, and 

 anterior angles distinctly expanding and tubercular in 

 front of a constriction; posterior margin straight; pos- 

 terior angles with one long and one short hair in point of 

 angle, and near them five long hairs set in an elliptical 

 clear space; brown, palest in center, lateral bands very 

 dark in posterior two-thirds, and bending in along an- 

 terior margin. Legs colored. 



Abdomen elongate elliptical, with posterior angles pro- 

 jecting, and two or three rather long hairs in each angle; 

 a few long hairs on dorsal surface; segment i all brown, 

 others with strong, quadrangular, lateral, brown blotches, 

 black on outer margin, and with uncolored stigmatal spots 

 and a median quadrangular light brown blotch; posterior 

 angles uncolored; segments 8-9 undivided, but with 

 distinct blotches and no median blotches; segment 9 

 rounding, hardly if at all emarginated, and with only a 

 few short hairs. 



Nirmus orarius n. sp. (Plate v, fig. 5.) 



A single specimen from a Golden Plover, Charadrius 

 dominions (Lawrence, Kansas). This form is a member 

 of the group obscuro-siUurati ', and resembles somewhat my 

 species bcefihilus from a Killdeer Plover, ^^Egialitis vocif- 

 erus; the body, however, is shorter and not parallel-sided, 

 though the form is still a slender, graceful one. 



Female. Body, length 1.84 mm., width .4 mm.; pale 

 with narrow distinct marginal markings. 



Head, length .5 mm., width .28 mm.; head elongate 

 conical, with expanded uncolored part of clypeus in front 

 not angulated as in bcrphi/ics, but rounding; three clypeal 

 hairs and one on dorsal surface in front of the trabecula 

 projecting over the margin; trabecula? small, clear, but 

 distinct; temporal margins weakly convex with two long 

 hairs; occipital margin faintly concave; eyes flat with a 



