5l6 CALIFORNIA ACADEMY OF SCIENCES. 



labral lobes inconspicuous, not projecting beyond margin 

 of head; a distinct, curved, dark brown blotch bounding 

 inner margin of antennal fossa; in front of it two paler 

 blotches, the anterior being the larger, and a narrow dark 

 brown occipital border; the rest of head concolorous 

 with the body or paler. 



Prothorax hexagonal, the angles rounded, the lateral 

 angles with a longish weak hair and a spine; a distinct, 

 brown, submarginal border laterally, which turns inward 

 at its anterior end and is looped. Metathorax longer 

 than prothorax, with gently sinuous sides, without distinct 

 marginal hairs (a short projecting hair or spine near the 

 posterior angle is not strictly marginal) ; posterior margin 

 straight; anterior angles with irregular brown blotch, a 

 linear, diagonal blotch on each side near middle, and sub- 

 marg-inal lateral bands continuous with those of the ab- 

 domen. Legs long, slender, concolorous with the body. 



Abdomen elongate-elliptical, truncate anteriorly, with 

 sharply marked dark brown to black submarginal lateral 

 bands composed of segmental parts separated by diagonal 

 sutures and slightly laterally displaced ; posterior angles 

 of segments with one or two weak hairs; vulva convex. 



Physostomum australe n. sp. (Plate lxx, fig. 4.) 



One female from a Western Nonpareil, Passerina ver- 

 sicolor ( Cameron County, Texas), resembling angula- 

 tion in marking but smaller and head comparatively 

 shorter and narrower anteriorly, hence more tapering; 

 with abdomen with median blotches which are wanting 

 in angulatum. 



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

 1.06 mm.; almost uncolored, with yellowish tinge strong- 

 est on head and thorax; with sharp black lateral mark 

 ings and pale brown median abdominal blotches. 



