490 PROCEEDINGS OF THE ACADEMY OF [1893. 



1. — Ancistromma aurantia Fox. 



Larra aurantia Fox, Ent. News. p. 194. 9 • 



9 . — Anterior margin of clypeus truncate, the lateral angles 

 strongly produced, just before these angles there is a single tooth; 

 front with close punctures, appearing granulated ; vertex very finely 

 and closely punctured ; space between eyes at top just about equal 

 to the length of antennal joints 2 and 3 ; antenme tolerably long 

 and setaceous though scarcely as long as the head and thorax united; 

 first and second joints of flagellurn about equal in length; dorsulum 

 with the punctures fine and compact ; scutellum impressed ; meta- 

 thorax rugose, most strongly so on upper surface, on which place 

 there is a distinct, longitudinal, medial furrow; tibiae and tarsi 

 strongly spinose ; pygidial area sparsely and strongly punctured, 

 about one-third longer than it is broad at the base, the apical half 

 densely pubescent. Black; abdomen orange, sometimes with some 

 dark blotches dorsally; head and thorax not pubescent and the ab- 

 domen not pilose ; wings pale fuscous, iridescent, nervures black ; 

 marginal cell on apical portion, separated for about one-fifth its entire 

 length from the anterior margin of the wing, therefore being more or 

 less pointed at apex; tarsi testaceous. Length 11-15 mm. 



$ . — Anterior margin of clypeus rounded-out, emarginate medi- 

 ally and not dentate laterally; front granulated ; vertex very finely 

 and closely punctured ; space between the eyes at top about equal to 

 the length of antennal joints 2 and 3 united ; first joint of flagellum 

 about equal to or very slightly shorter than the second in length; 

 dorsulum and scutellum sculptured as in the 9 > the scutellum im- 

 pressed; legs rather feebly spinose ; colored like the 9 but with the 

 apical abdominal segments black and the wiugs subhyaline, with 

 the nervures testaceous ; face and clypeus with silvery pubescence, 

 the thorax and abdomen with a sparse, silvery pile. Length 10-11 

 mm. 



Montana; Nebraska; California (Coll. Ashrnead.) The distance 

 between the recurrent nervures at the top is usually greater than the 

 distance between the first recurrent nervure and the base of the second 

 submarginal cell. 



2. — Ancistromma capax u. sp. 



9 . — Anterior margin of clypeus emarginate medially, the lateral 

 angles strongly produced, just before these angles there is a small 

 tooth ; front finely and closely punctured, rather protuberant on each 



