OF WASHINGTON. 235 



This insect has the venation of Fenusa if the rudimentary 

 stump of the ist cubital cross-vein be ignored. 



Scolioneura canadensis n. sp. 



Female. Length 3.5-4 mm. Rather robust, smooth, shining. Cly- 

 peus truncate, head smooth, sutures not distinctly defined; antennae 

 shorter than thorax alone, scarcely tapering: inner tooth of claw short, 

 inconspicuous ; radial cross-nerve not interstitial. 



Color. Head, thorax except anterior and lateral lobes, and abdomen, 

 brownish-black; legs pallid; femora, especially middle and hind pair, 

 brownish; clypeus and mouth-parts pallid; anterior and lateral lobes of 

 thorax reddish-yellow; eyes green iridescent; wings hyaline; veins 

 brown. 



Described from two specimens collected in Canada. Types 

 belonging to the American Entomological Society of Philadelphia. 



Scolioneura populi n. sp. 



Female. Length 4 mm.; very robust, glistening; clypeus broad, trun 

 cate, projecting over labrum ; prominent sutures running from base of 

 antennas to occiput; basin of anterior ocellus small, circular and connect 

 ing with elongate posteriorly-tapering antennal fovea ; antennae very 

 short, not twice length of head, third joint twice as long as fourth, others 

 subequal, shortening but little towards terminal ones; transverse radial 

 and third transverse cubital veins interstitial or nearly so; sheaths mod 

 erately robust, truncately rounded, somewhat pointed at upper apical 

 angle; claws with large sub-apical tooth, below tooth greatly broadened. 



Color. Yellowish ferruginous inclined to whitish on head, thorax and 

 abdomen; lateral and basal sutures of vertex, antennal fovea, ocellar 

 basin, occiput, thorax dorsally except distinctly defined border of anterior 

 and the sides and apex of lateral lobes of mesothorax, two spots on scutel- 

 lum, abdomen dorsally except two or three terminal segments, meta- 

 episterna, lower third meso-epimera, black; legs, meso-epimera and light 

 area of lateral lobes of mesothorax inclined to ferruginous ; antennae black, 

 obscured by white pubescence, fulvus beneath; wings hyaline, veins and 

 stigma brownish, costa pale. 



Male.^ mm. long; less robust than female; structurally as in female; 

 lateral lobes of mesothorax marked with white laterally, scutel black, ter 

 minal abdominal segments light apically ; abdomen infuscated beneath, 

 especially basally, hypopygium pale; ferruginous limited to legs other 

 wise color as in female. 



Described from three females and one male, from C. H. T. 

 Townsend, Las Cruces, N. M. Types in the Coll. U. S. Nat. 

 Mus. 



This species is supposed by Mr. Townsend to be the parent of 

 the larva which mines the leaves of Populus fremontii inju- 



