1922] Brues — The Genus Pedinomma in North America 7 



Pedinomma^ nearcticum sp. nov. 



cf Length 4-4.3 mm. Fulvo-f erruginous ; flagellum, palpi, 

 legs beyond femora and the adbominal segments beyond the 

 middle of the second, lighter; first and basal half of second 

 abdominal segments and teeth of mandibles darker, more or less 

 fuscous. Head and thorax, except as noted, subopaque finely, 

 granular. Head seen from above one-half longer than broad, its 

 sides parallel behind the eyes, the centers of which are at the 

 anterior third of the head; narrowed obliquely in front of the 

 eyes so that the short antennal prominence is one-third as wide 

 as the vertex. In profile the head is an almost equilateral 

 triangle gently convex above and below. Eyes ovoid, placed 

 near the top of the head, broadest in front, separated by a little 

 miore than their length from the base of the antennee and as 

 broad as the thickness of the scape. Maxillary palpi short, 3- 

 jointed; first joint very short; second broad, enlarged at apex; 

 third slender, pointed, nearly as long as the second; labial palpi 

 2-jointed, short. Mandibles broad, with four subequal teeth, 

 clypeus clearly separated, one-third as long as the face, with 

 large lateral fovese. Antennse 10-jointed; scape as long as the 

 head, as long as the four following joints; second twice as long as 

 thick and two-thirds as long as the third which is two 

 and one-half times as long as broad; following gradually more 

 attenuate, but not perceptibly shorter; last (the tenth) one- 

 fourth longer than the ninth. Ocelli entirely absent. Thorax 

 three times as long as broad above where it is barely as wide as the 

 head; widened below, especially in front so that the pleurae 

 are visible from above; dorsal surface almost flat above; 

 pronotum as long as the propodeum, but the mesonotum and 

 scutellum together about half as long as either of the others; 

 prothorax with a distinct constriction near the anterior edge 

 extending from the lateral edge entirely across the middle; 

 anterior to this it is indistinctly transversely aciculate. Mesono- 

 tum very small, in front two-thirds as wide as the pronotum, and 

 narrowed behind, with, the lateral edge raised and preceded by a 



iWestwood applied the name Myrmecomorphus to'his species, but Forster considered this 

 as a homonym of Dufour's dipterous genus Myrmemorpha since the latter word is incorrectly 

 formed. Later authors have used Forster's name Pedinomma and I have here followed them 



