a. C. DAVIS. '^-^1 



less ferruginous and hind legs rufous; wings fusco-hyaline, nervures and stigma 

 reddish hrown ; head and thorax nlosely punctured and pilose : parapsidal grooves 

 distinct ; scutellura oval, flat above ; abdomen rather slender, oval, pilose ; coarsely 

 punctured on two basal segments, finely punctured on the remaining ones; basal 

 segment carinate, second segment with oblique grooves at the base, third segment 

 with the grooves somewhat indicated. 



Four females and three males from New Hampshire (Mt. Wash- 

 ington, Mrs. Slo.sson). Type, coll. Ashmead. 



DiHhurii!^ siniilis n. sp. 



9 and '^ (?). -7 nun. Black, with face, anterior orbital lines, scape beneath, 

 mouth-parts, cheeks, tegula;, line in front, small line beneath, scutellunis, pectus, 

 spot on sternum, line above anterior coxge and one posterior to this on niesoplenra, 

 four anterior coxte, all of trochanters, venter and large semicircular spots on 

 median apical portion of abdominal segments, pale yellow; remainder of legs 

 rufous with posterior tarsi, and perhaps tibige. brownish ; wings subhyaline, ner- 

 vures and stigma brown, whitish at base; head and thorax polished, scarcely 

 punctured, the sternum and metathorax excepted ; clypeus separated by a deep 

 groove, parapsidal grooves distinct on anterior portion, the median lobe somewhat 

 prominent; scutellum polished, broad, flat above ; abdomen longitudinally rugu- 

 lose and carinate on basal segment; second and third segments coarsely punc- 

 tured at base and the second with narrow oblique grooves; remainder polished 

 and finely punctured. 



Two specimens from Colorado and Montana. T3'pes, coll. Amer. 

 Ent. Soc. and G. C D. 



Diaboriis ignipes n. sp. 



9 'J, . — 7 mm. Black, with face, except short triangular portion beneath an- 

 tennae, anterior orbital lines, scape beneath, mouth-parts, cheeks, pectus, anterior 

 trochanters and coxse, line above, small stripe on anterior mesopleura, tegulse, 

 line in front, postscutellum, apex of scutellum. venter, lateral margins of apical 

 abdominal segments and median dorsal spots on apical portion of each segment 

 becoming transversely oblong toward the apex, yellow ; legs, except anterior 

 coxiB and trochanters, uniform rufous; wings hyaline, stigma and veins pale, 

 yellowish ; antennae reddish brown ; head and thorax, including mesopleura, 

 pilose and rather coarsely and closely punctured ; metathorax and basal segment 

 of abdomen rugulose, carinate; second segment very closely punctured and with 

 oblique basal grooves; remaining segments polished, finely punctured. 



One female and three males from New Hampshire and Canada. 

 Types, coll. G. C. D. and Amer. Ent. Soc. 



Diaboriis inediatus Cress. (Ctemscus). Proc. Ent. Soc. iii, 282. 



9 % . — 4-5 mm. Black, with face, anterior orbital lines, scape beneath, mouth- 

 parts, cheeks, tegulse, line in front, tip of scutellum. pectus, all coxse and tro- 

 chanters, most of venter and median apical spots on abdominal segments, yellow ; 

 antennae brown, reddish beneath ; wings hyaline, nervures and stigma reddish 

 brown ; head, thorax and abdomen polished, sparsely punctured and finely pilose 

 metathorax, first and base of second abdominal segments closely punctured, rest 

 of abdomen ])olished ; carina* on first segment and oblique grooves at the base 

 of second segment. 



TRANS. AM. P:NT. SOC. XXIV. AUGUST, 18}»7. 



