248 WILLIAM J. FOX. 



testaceous : face, clypeus, thorax more densely in the sutures and the legs sparsely 

 clothed with pale pubescence; pygidium with a bright golden pubescence. 

 Length 11 — 15 mm. ' 



% . — Fourth joint of autennte but little longer than the preceding one, joints 

 4 — 7 not equal, each shorter than the preceding one; front divided by a very 

 deep sulcus; vertex punctured as in the female, but lacks the large scattered 

 punctures, the impressed line tolerably distinct; scntellum not impressed; 

 raetanotuni with a faint impressed line. Legs, except coxpe, trochanters and 

 basal half of femora, ferruginous; tibiae and tarsi distinctly spinose. Abdomen 

 not, or indistinctly punctured above, ventrally with rather coarse, close punc- 

 tures; apical half of first and the second segments entirely ferruginous, the 

 apical margins of the other segments more or less testaceous; eighth ventral 

 segment with a round, broad emargination. Length 9 — 11 mm. 



Georgia, Florida, Mississippi, Texas, Nebraska, California. A 

 variable species, both in size and coloring. 



18. Tachytes tniiiiinus n. sp. 



%. — Eesembles rufofasciatns, but is much smaller; joints 5 — 7 of antennae 

 about equal in length, the fourth slightly shorter than the fifth and about one- 

 quarter longer than the third ; front strongly and evenly convex, finely and 

 closely punctured, with a faint impressed line; impression behind ocelli strong, 

 out of which a distinct and rather long impressed line originates; anterior mar- 

 gin of clypeus subtruneate; dorsulum more finely punctured than the front; 

 scntellum not impressed ; metanotura not at all furrowed, finely, but distinctly 

 granulated, the fovea at apex indistinct; tibiae and tarsi feebly spinose; notch 

 on fore feniora more distinct than in rufofasciahis ; abdomen above and beneath 

 indistinctly punctured ; eighth ventral segment not near so deeply notched as in 

 rufofasciatns, black; front, face and thorax sparsely clothed with silvery pubes- 

 cence; mandibles medially, scape at apex, tips of femora, tibiae and tarsi, red- 

 dish yellow ; tegulae and apical margins of dorsal segments pale testaceous, the 

 latter have in addition silvery pile. Wings subhyaline, iridescent, nervures 

 dark. Length 5.5 — 7 mm. 



Texas, Georgia, Illinois. 



19. Tachytes abdoiiiiiialis Say. 



9 . — Anterior margin of clypeus rounded, a little thickened and slightly emar- 

 ginate in the middle, the emargination not always distinct, the two lateral teeth 

 short and obtuse; space between eyes at top but little, if anything, greater than 

 the length of joints 2 and 3 of the antennte united ; median impression of vertex 

 rather strong; first joint of flagellum about equal to the second, which is slightly 

 longer than the third, the apical joints more than two times longer than broad. 

 Thorax punctured like the vertex; depression on dorsulum anteriorly in the 

 middle faint; scntellum not impressed; metanotum finely granulated, with a 

 slight, but not always distinct impressed line down the middle, the fovea at apex 

 not striated ; sulcus on posterior face not much broader at ba.se than at apex ; 

 ventral abdominal segments 3 — 6 with large, sparse punctures; pygidium rather 

 strongly depressed along its margin, black : mandibles more or less rufous ; tarsi 

 and segments 1 and 2, sometimes the third also ferruginous: front, clypeus, 

 thorax, legs and abdomen moi-e or less silvery; occiput, metathorax and first 



