1(32 WILLIAM J. FOX. 



apical joints of flagelluni scarcely longer than the four preceding joints united, 

 the two penultimate joints not longer than hroad ; pronotuni with a ])oorly de- 

 velopsd ridge anteriorly, the lateral tooth smaller; epimerum mesopleuralis with 

 large, sparse, punctures, only striated above; middle segment less coarsely sculp- 

 tured : first joint of medial tarsi longer by about one-fifth than the remaining 

 joints united ; anterior femora at base of outer margin with a short, sharp pro- 

 duction ; tibial shield smaller than in pleuralis, and scarcely as acute at apex, in 

 color, the greater part black, basally greenish, with broken streaks of yellow, first 

 joint of fore tarsi longer than the remaining joints united ; anterior trochanters 

 and femora in part, tubercles and scutellum sometimes black ; a lateral yellow 

 spot sometimes on fourth ventral segment: niesostemum with long, sparse, pale 

 pubescence; first joint of fore tarsi black ; wings subhyaline, tinged with yellow. 

 Length 11-13 mm. 



Nevada ; Colorado ; Texas ; Montana. The marking!? of the ab- 

 domen are much heavier than in the two following species. 



36. C^rabro pleuralis n. sp. 



9 .—Head finely and indistinctly striato-punctate above, in front distinctly 

 striated ; space between hind ocelli less than that between them and the nearest 

 eye-margin ; anterior margin of clypeus with a large blunt tooth on each side ; 

 pronotum not margined anteriorly, the lateral tooth small, but sharp and distinct ; 

 dorsulum with exceedingly compact punctures, rather granulated than punctured ; 

 mesopleui-se striated, must distinctly above, the strise interspersed with punctures 

 on lower portion ; middle segment with tolerably fine, even, longitudinal stria- 

 tions, the medial furrow rather narrow, posterior face transversely striated, lateral 

 ridges tolerably well developed, sides striated, the strength of the striae variable. 

 Black, including tubercles; mandibles except apical third, clypeus more or less 

 (sometimes almost entirely black), sc^pe except spot posteriorly, two spots on 

 pronotum almost touching medially, scutellum anteriorly, femora narrowly at 

 tips, tibise except spot within, tarsi entirely, the apical jo.ints, however, darker, 

 two sinuated spots on first abdominal segment, touching internally, an elongate 

 spot on each side of segments 2 and 3, obtuse internally, a band on segments 4 

 and 5, an irregular spot on each side of ventrals 2 and 3, yellow ; head with the 

 pubescence about as in monticola, that on the dorsulum short and stiff; wings sub- 

 hyaline, slightly darker apically, nervures and stigma paler than in the species 

 mentioned. Length 12-13 mm. 



'^ . — Head coarsely striato-punctate, above ; cheeks strongly depre.ssed and 

 ridged beneath near the eye-margin ; space between hind ocelli much less than 

 between them and the nearest eye-margin ; flagellum broadest at the fourth 

 joint, narrowed from that point to the apex, the first joint with a bunch of pale 

 hair beneath, four apical joints distinctly longer than the four preceding joints 

 united, the two penultimate joints longer than broad; pronotum not margined 

 anteriorly, but very strongly dentate laterally ; dorsulum coarsely and compactly 

 punctured, the mesopleuife coarsely striato-punctate, their episternal furrow rather 

 strongly foveolate ; middle segment above more coarsely and irregularly striated 

 than in the 9 » the sides and posterior face much more so than in that sex, lateral 

 ridges of posterior face well developed; first joint of medial tarsi but little if 

 anything longer than the remaining joints united ; anterior femora at the base 

 of outer margin with a large, somewhat liifurcated, production ; tibial shield large, 

 shaped about as in palUdn.s, in color : basally yellow, posteriorly greenish, streaked 



