NO. 1927. DESCRIPTIONS OF NEW HYMENOPTERA, 5— CRAWFORD. 179 



PLEUROTROPIS LITHOCOLLETIDIS Ashmead. 



Entedon Jithocolletidis Ashmead, Bull. No. 3, Kansas State Agr. Coll., Appendix 

 p. vui, 1888. 



PLEUROTROPIS ALBITARSIS Ashmead. 



Entedon albitarsis Ashmead, Can. Ent., vol. 20, 1888, p. 102. 



PLEUROTROPIS WILDERI Howard. 

 Mestocharis tvilderi Howard, Proc. Ent. Soc. Wash., \nl. 2, 1892, p. 298. 



PLEUROTROPIS RUGOSITHORAX, new species. 



Female. — Length about 1.5 mm. Deep bluish, the head aeneous; 

 face both above and below V-shaped furrow reticulated with raised 

 lines; scape blue, rest of antennae brown, with bluish tints; first joint 

 of funicle slightly longer than pedicel; mesoscutum and scutellum 

 with sculpture simihxr to that on head, but coarser, and the carinsB 

 higher, the sculpture producing the appearance usiuilly designated 

 in this group as scaly; median lobe of mesoscutum at apex with two 

 depressions, but these covered with sculpture exactly as rest of meso- 

 scutum and not resembling fovese; propodeum smooth, with the usual 

 two medial carinse and the lateral carina?; wings hyaline; legs blue, 

 the tibige at apices, testaceous; basal joints of tarsi white; abdomen 

 smooth, polished. 



J/a7e.— Length about 1 mm. Similar to the female, the scutellum 

 bronzy, antennae entirely blue, the funicle four-jointed, the legs 

 colored as in the female. 



Habitat. — Salt Lake, Utah. 



Two female and one male specimens received from Bureau of 

 Entomology, United States Department of Agriculture, under note 

 numbei' Webster No. 6639, with the additional data, reared from 

 Agromyza, in leaves of alfalfa. C. N. Ainslie collector. 



Type.~Cat. No. 14786, U.S.N.M. 



Genus DEROSTENUS Westwood. 



This genus was stated by Westwood in his original description to 

 be aUied to Closterocerus and the species here assigned to the genus 

 bear a great resemblance to species of Closterocerus, but differ in 

 generic details, such as the hyaline wings, the nonflattened antennaB, 

 etc. 



TABLE OF SOME OP THE SPECIES FROM THE UNITED STATES. 



1. Middle legs, except coxae, light colored pictipes Crawford 



Middle femora dark 2 



2. Abdomen distinctly sculptured, stigma with a very small cloud. 



puncfiventris Crawford 

 Abdomen smooth, winga without a stigmal cloud diastatse Howard 



