AMERICAN HYMENOPTERA. 317 



truncate posteriorly, equalling in width the thorax, the vertex and front closely, 

 the occiput sparsely, finely punctured, the punctures of the ocellar triangle 

 transversely confluent ; ocelli comparatively small, the front one flattened, dis- 

 tant its own width from the posterior ones which are separated slightly more 

 than their distance from the eyes; clypeus raised at the middle of the hase ; 

 mandibles pointed, densely pubescent, the hasal production strong ; antennae 

 defective. Pro- and mesothorax deeply punctured, the punctures subconfluent, 

 especially on the dorsum where they become transversely so, mesonotuni with 

 four deeply impressed grooves abbreviated on their anterior third ; scutellum 

 rugoso-punctate, metathorax moderately reticulate, the basal areas long; the con- 

 strictions of the pleurae slight, polished, remainder closely punctate ; thorax elon- 

 gate ovate, but little narrowed behind, prothorax with long, erect, whitish bairs, 

 remaining hairs shorter and sparse; mesosternum nearly hare, closely punctured, 

 deeply impressed medially, the impressiom bounded by a ( )-shaped ridge con- 

 sisting of seven transverse teeth, the front one black and strongest. Petiole of 

 abdomen somewhat longer than broad at tip, nearly sessile with the second seg- 

 ment, finely and sparsely punctured, the punctures elongate and coarser in front; 

 second segment more densely punctured along the sides, sparsely and irregularly 

 on the disc; the apical margin of the remaining segments fringed with whitish- 

 hairs; no erect hairs except on petiole; first ventral segment sharply carinate in 

 front, second segment subconfluently punctured in front. Legs normal, without 

 bristles, tibial spurs long, testaceous, the hind ones two-thirds the length of the 

 metatarsi. Wings subhyaline, cinerascent apically, veins and stigma fuscous, 

 second suhmarginal conspicuously longer than broad, its hind border longer than 

 the second transverse cubital vein ; third suhmarginal cell weak. 

 Length. 8 mm. 



Described from one male, collected by the writer at Austin, 

 Texas, May, 1901, and named in honor of William Morton Wheeler, 

 my talented instructor, in memory of the many pleasant hours spent 

 with him in the Texas-country. Tt differs from hyalina Blake by 

 the coarser punctuation and different venation. 



82. M nl ill;i trita sp. nov. 



Small, pale, testaceous, thorax sparsely punctured, basal areas of metathorax 

 moderate, mesosternum with two short teeth, petiole smooth, nearly sessile with 

 the smooth second segment, hairs of body sparse, the abdominal fringes finely 

 plumose, wings hyaline, veins pale yellow, third suhmarginal wanting. 



Male. Small, rather slender, pale testaceous species. Head rounded, occipital 

 angles not broad, little produced behind the eyes, ocellar triangle infuscated, the 

 dark color diffused over the front; head very sparsely puuctured ; ocelli moder- 

 ate, the hind ones slightly further from each other than from the eyes; the 

 punctures of the front become deeper toward the antennae, replacing the median 

 groove; clypeus simple; tips of mandibles blackened, the basal tooth weak, 

 obtuse; antennae short, testaceous, scape paler, almost glabrous. Prothorax 

 roughened but not punctured ; mesonotuni with moderate separated punctures 

 and strongly abbreviated grooves; scutellum finely rugose; metanotum with 

 coarse but shallow reticulation, the basal areas equalling three areoles; meso- 



TRANS. AM. ENT. SOC, XXIX. OCTOBER, iy03 



