14 M. A. Carrikci 



and darker and wider on segments five and six; genital hooks 

 very short, slender, and widely cnrving ; a hair on the posterior 

 margin of segments three to six, just within the lateral bands; 

 four short hairs on the median portion of the posterior margins 

 of segments two to six, and two on the first. 



Two males collected on Rliaiiiphastos tocard, at Pozo Azul, 

 Costa Rica, June, 1902. This species resembles Piaget's coniccps 

 more than any other form of the genus. 



Nirmus hastiformis sp. nov., pi. II, fig. 2 



Female. — Body, length 1.73 mm., width .53 mm.; uniformly 

 golden brown, with rounded forehead, encircled by the antennal 

 bands, and spear shaped abdomen, having narrow lateral bands, 

 scarcely darker than the heavy transverse bands. 



Head, length .47 mm., width .45 mm. ; front converging, 

 slightly concave sides and evenly rounded clypeus, with a few 

 very short, fine hairs ; trabeculae small, pointed, pale golden ; 

 antennae of medium size, joints subequal, pale golden ; temples 

 slightly expanded laterally and posteriorly, with one long hair 

 and several short bristles; occiput convex; eye small, obscured, 

 with a fine, short bristle ; mandibles heavy, bright chestnut ; an- 

 tennal bands, scarcely darker than the golden brown temples, 

 encircle the forehead, but are broken by a clear, diagonal line at 

 the cl3'peal suture ; region in front of the mandible clear, as is the 

 portion enclosed by the occipital bands, and also a small area at 

 the bases of the antennae ; a black ocular fleck, and a golden 

 brown, spear-shaped occipital signature. 



Prothorax quadrangular, broader than long, with sides flatly 

 convex and posterior angles with one hair ; lateral bands scarcely 

 darker than the interior of the segment. Metathorax pentagonal, 

 posterior margin obtusely angled on abdomen, with four slender 

 hairs on each side, and two spines in the rounded posterior angles ; 

 sides slightly convex and diverging; lateral bands and interior 

 portion of segment the same color as in the prothorax. Legs 

 stotit, though little swollen, clear golden brown. 



Al)domen rather long, spear-shaped, with rounded, widely pro- 

 jecting, posterior angles, furnished with from one to three hairs 

 in segments four to seven and one in the anterior and posterior 



136 



