IOO CALIFORNIA ACADEMY OF SCIENCES. 



of this new Nirinus were taken, one from each of two 

 birds. The new form belongs to the group nigropicti. 



Body, length 3.25 mm., width .5; with marginal mark- 

 ings of black, and abdominal blotches of chestnut brown. 



Head, length .56 mm., width .5 mm.; broadly conical, 

 widest at posterior angles, with temporal margins and 

 margins of forehead in nearly straight diagonal lines; 

 clypeus truncate in front (even slightly concave), with 

 three lateral short hairs ; signature with broad anterior 

 margin colored (brown); a rather broad lateral black 

 line interrupted posteriorly by the suture, but reappearing 

 behind the suture as a black blotch; antennal bands 

 black, outer ends curving forward; trabecular distinct, as 

 long as first antennal segment; antennas with second seg- 

 ment longest, fifth longer than third or fourth which are 

 equal, uncolored, except the fifth segment, which is light 

 brown with distinct short hairs on tip ; eyes with a bristle ; 

 temporal margins narrowly bordered with black and with 

 one long hair; occipital angles rounded, posterior border 

 doubly emarginated; occipital signature black and labium 

 brown, visible on under side; mandibular rami strongly 

 colored. 



Prothorax quadrangular, much narrower than head ; 

 angles obtuse to rounding; lateral margins strongly and 

 broadly colored, the colored band running inward along 

 the posterior margin for about one-third the length of the 

 margin and slightly expanded at inner end. Metathorax, 

 transverse, five sided, lateral margins with a feeble concav- 

 ity, posterior angles rounding with five separated, strong, 

 pustulated hairs arranged, irregularly spaced, the three 

 outermost close together, in a row extending inwards 

 along the posterior margin; posterior margin obtusely 

 angled on the abdomen; lateral margins with a strong, 

 dark brown, linear blotch expanding at the ends; sternal 



