BIOLOGICAL PAPERS. 321 



metaDotum rugulose, with two distinct transverse carinas, not connected by 

 longitudinal carina? on the superior face, therefore no areola, no distinct basal 

 area, the petiolarea about as broad as long, occupying practically all of the pos- 

 terior face of the segment; the metapleura duller and more densely ruguloso- 

 punctate than the mesopleura; wings moderately smoky, the nervures dark 

 brown, the stigma pale brown ; transverse median nervure received by the median 

 nervure a little basad of the basal nervure, the so-called discocubital nervure 

 broken by a short abcissa in the middle; areolet pentangular, the second cubital 

 side about equal to the radial side, the other sides subequal, transverse median 

 nervure broken where the lower third of the nervure meets the middle third. 

 Abdomen smooth and shining, covered with whitish pubescence, rather ap- 

 pressed and abundant on the face, dorsulum and abdomen; clypeus anteriorly 

 and metathorax with erect, rather sparse pubescence; pleura with appressed, 

 inconspicuous pubescence. Black; scape with a line in front, inner orbital 

 margin entirely, a very narrow orbital line occupying the middle third of the 

 orbital margin of the cheeks, the supraclypeal protuberance, the clypeus, mandi- 

 bles, except base and apex, prolongation of the orbital band on the malar space, 

 anterior coxaj with a small spot anteriorly, anterior trochanters beneath more or 

 less, basal trochanter of middle legs with a stripe beneath, lemon yellow ; distal 

 trochanters, tibia^ and femora largely testaceo-ferruginous to ferruginous, the 

 apical fourth of the posterior tibia» fuscous, tarsi of the four anterior legs con- 

 colorous with the tibia^ thereof, except the apical joint and claws which are 

 brown, tarsi of posterior legs almost entirely fuscous. 



Type: University of Kansas. Type locality: Douglas county, Kansas, 900 

 feet. F. H. Snow. 



Pezomachus alogus, n, sp. 



Male. — Length, 3.5 mm. Head dullish, subtle, minutely and indistinctly 

 sculptured; clypeus conspicuously separated from the face; malar space about 

 as high as the mandibles are broad at base; distance between anterior ocellus 

 and lateral ocellus nearly as great as the distance between the lateral ocelli, 

 the latter distance a little greater than the distance between the lateral ocellus 

 and nearest eye margin; antenna? twenty-three jointed, scape and pedicellum 

 together about two- thirds the length of the first joint of the flagellum. Thorax 

 with the pleura rather shining, the dorsulum more dullish with no indication of 

 parapsidal grooves; metanotum rather evenly rounded, exareolate, and dullish, a 

 short transverse groove at the middle of the posterior margin of the mesopleura ; 

 metapleura more shining than the metanotum, but subtle. Abdomen dullish ; 

 petiole nearly parallel sided, the apex not much wider than the base, sculpture 

 of the first two segments not coarse, similar to the succeeding segments which 

 are smooth and apparently impunctate. Wings nearly clear, faintly smoky, with 

 a faint brownish band beneath the stigma and some brownish in the vicinity of 

 the junction of the basal nervure with the median and transverse median nerv- 

 ures, stigma and nervures dark brown, the proximal angle of the stigma whitish ; 

 sides of the open areolet equal or nearly, discocubital nervure not broken; trans- 

 verse median nervure interstitial with the basal nervure; the transverse median 

 nervure in the posterior wings broken distinctly below the middle but not quite 

 as far down as the upper end of the basal third of the nervure. Inconspicuously 

 covered with whitish pubesence. Black; scape, pedicellum, mandibles, except 

 tips, labrum, prothorax, legs and first three abdominal segments almost entirely 

 testaceous; first joint of the flagellum at base, anterior lateral edges of the 

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