228 CHAKLES A. BLAKE. 



ceuce, except apex, which is pale yellow, lateral cariufe of second segment iironii- 

 uent, ventral surface somewhat paler than above, apex black. Length 8-12 mm. ; 

 expanse of wings 14-20 mm. 



Hab. — Kentucky, Colorado, Montana. 



This species is allied to S. castor Blake, but can easily be separated 

 by the abdomen being entirely, except basal segment, fusco-ferrugin- 

 ous, Avhereas in that species the apical segments are black. In some 

 specimens the pubescence is entirely black. 



f§»plit)eroplithalina feiiesf rata St. Farg. 



Male. — Black ; head and thorax with black pubescence ; wings blackish, mar- 

 ginal cell truncate at tip; abdomen petiolate, second segment pale ferruginous, 

 nearly naked, apical segments clothed with black pubescence ; eyes round. 

 Length 11-13 mm. ; expanse of wings 19 mm. 



Hab.— Atlantic States. 



Spha^rophtlialiua ochracea Blake. 



Hale. — Black ; head, thorax and abdomen, with exception of the first, and 

 basal half of second segments, clothed with long, erect, ochraceous pubescence ; 

 head round, closely punctured ; eyes prominent, round, polished; antennae black, 

 scape finely punctured ; thorax robust, ovate, metathorax abruptly truncate, 

 coarsely reticulate, flanks coarsely punctured ; wings fuliginous, marginal cell 

 short, truncate at tip, three distinct submarginal cells, first longer than the mar- 

 ginal, the second subquadrate, receiving the first recurrent nervure near the base, 

 the third pentagonal, extending beyond the marginal ; tegulse large ; legs black, 

 clothed with black hairs; abdomen ovate, basal segment coarsely punctured, 

 clothed with erect black hairs, second more moderately punctured ; under side 

 black. Length 16 mm. 



The female differs in having the sculpture of thorax much coarser and the 

 pubescence somewhat paler. Length 12 mm. 



Hab. — Nevada. ( Morrison . ) 



This species closely resembles aureola Cresson, l)ut may he distin- 

 guished by the smaller size of the head. 



SphHTophtlialina ereoii Blake. 



Male. — Ferruginous; head round, closely punctured, thinly clothed with erect 

 black hairs ; scape of antennse castaneous, flagellum piceous ; eyes round, promi- 

 nent ; thorax ovate, densely punctured, sparsely clothed with erect black hairs, 

 metathorax roundly truncate, coarsely reticulate ; wings moderate, fuscous, sub- 

 hyaline from base to beyond the middle, marginal cell subovate, roundly trun- 

 cate at tip, three submarginal cells, second subtriangular, receiving the first re- 

 current nervure at middle, third narrowed beneath, receiving the second recurrent 

 close to its apical nervure; tegulse round, tufted posteriorly with pale hairs; legs 

 black, thinly clothed with whitish hairs ; abdomen ovate, petiolate, basal seg- 

 ment densely punctured, second segment fulvo-ferruginous, darker at base, finely 

 and closely punctured, apical margin black, third, fourth and fifth segments 

 black, clothed with long black pubescence, apical segments with pale yellowish ; 

 ventral segments fringed with pale yellowish hairs; apex with two sharp longi- 

 tudinal carinse. Length 11 mm. : expanse of wings 14 mm. 

 Hab. — Texas. One specimen. 



