62 PROCEEDINGS OF THE ACADEMY OF [Feb., 



segment almost smooth at base, the punctures becoming stronger 

 toward apex where they are quite deep, the apical margin not 

 reflexed, but is depressed; third dorsal more closely punctured; first 

 joint of medial tarsi somewhat sinuous; wings subhyaliue, darker 

 along costa and in marginal cell. Length 8 mm. 



Chapada (December). Two specimens. The yellow spots on, 

 behind, and beneath the tegulje are wanting in one example. The 

 cariuated, deeply punctured clypeus, sulcus between ocelli, deeply 

 impressed scutellum, together with the mesially dark clypeus and 

 peculiar spotting of pronotum, easily distinguish this species. 



Odynerns rufosuffusus n. sp. 



9. — Black; mandibles, pronotum, mesopleurj?e above, and 

 tegulse, rufous; autennie reddish-testaceous, darker above; clypeus, 

 longitudinal line on front, spot at base of antennae, a large one 

 almost filling the eye-emarginations, line on cheeks above, fore 

 margin of pronotum obscurely, line on scutellum, dot on tegulae at 

 base, and line at apex of segments 1-5, yellow (these latter lines 

 sometimes obscure or wanting on segments 3-5); fore legs entirely, 

 the others from the base (or beyond) of femora, reddish-testaceous. 

 Head with the vertex elevated so that when viewed from the side it 

 appears subangulate above; punctures of the front large, well- 

 separated, though not very deep, those on the occiput much closer 

 and coarser, especially medially ; two large tubercles are situated 

 between the hind ocelli; in the eye-emarginations the surface seems 

 smooth and except for a series of fovese bordering the orbit of the 

 eye there ; clypeus broader than long, convex, apparently smooth, 

 with an unusually deep and narrow emargiuation at apex ; flagel- 

 lum clavate ; thorax with the pimctures much coarser than on head, 

 especially on dorsulum ; pronotum cristate, sharply dentate laterally ; 

 scutellum deeply impressed ; postscutellum large, fully half as long 

 as scutellum, rugoso-puuctate ; middle segment with a well-devel- 

 oped dorsal surface mesially, where it is also emai'ginate, rugoso- 

 punctate as far as sides Avhere the punctures are large and shallow, 

 almost forming a reticulation, concavity margined by a rim ; first 

 abdominal segment with fairly strong punctures, the usual carina 

 sharp, bordered posteriorly by fovese, and in about the middle of 

 the segment there is another more obtuse carina or ridge, somewhat 

 sinuous, and not entirely reaching the sides ; second segment with 

 finer punctures whifh become stronger toward the apical margin. 



