250 LAWRENCE BRUNER. 



139. Metathorax on each side of inclosure coarsely reticulated and nearly bare, 



nervures and stigma dark obscura Rob 



Metathorax on each side of inclosure rather finely rugose and closely pu- 

 bescent hippotes Rob. 



140. Head large; the cheeks broad and more or less angulated behind 141. 



Head of moderate size ; the cheeks narrower and less distinctly angulate be- 

 hind 142. 



141. Cheeks strongly produced behind the eyes and bordered by a carina or 



ridge. Inclosure of metathorax large and rather coarsely reticulated. 



platyparia Rob. 

 Cheeks broad, with a rounded angle at point opposite and but a little below 

 middle of eyes. Inclosure of metathorax finely roughened. 



geranii form maculata Rob. 



142. Inclosure of metathorax rather strongly reticulated. Hair bands on abdo- 



men almost obsolete. Face narrowed below Varolii Rob. 



Inclosure of metathorax longitudinally striate or ridged 143. 



143. Head and thorax with short, pale, fulvous pubescence. Bands on apex of 



abdominal segments 2-4, interrupted on 2 claytonire Rob. 



Head and thorax with long whitish pubescence, especially abundant on cly- 

 peus. Eyes wider apart below than above erigenia? Rob. 



144. Males 145. 



Females 158. 



145. Larger. 10 mm. and over 146. 



Smaller, 7 mm. to 9 mm. 147. 



146. Wings clear hyaline, the nervures and stigma brown. Pubescence silky 



grayish white, long on head and thorax ; bauds on abdomen at apex of 

 segments, interrupted and poorly defined, .el id rica Casad. & Ckll. 

 Wings hyaline, the apex broadly dusky. Pubescence yellow ochraceous, 

 long and dense. Apical margins of segments subtestaceous and fur- 

 nished with bands of short dense yellowish pubescence. 



texaua Cress. 



147. Pubescence on head and thorax more or less fulvous or rufous 148. 



Pubescence on head and thorax whitish, ochraceous, or at most brownish 



white 151. 



148. Wings somewhat infuscated or clouded apically 149. 



Wings hyaline or at most smoky-hyaline 150. 



149. Head and thorax clothed with a thin pale pubescence, inclining to rufous 



on clypeus and mesonotum. The fasciae on abdomen interrupted. 



hippotes Rob. 



Head aud thorax clothed with short fulvous pubescence. Nervures and 



stigma testaceous •• Forbesii Rob. 



150. Nervures and stigma very dark brown. Fascia; on abdominal segments 2-4 



orange-rufous, that on 4 entire saliciflori* Ckll. 



Nervures and stigma testaceous. Abdominal segments 2-4 with narrow 

 fascife, interrupted on 2 and 3 spira*ana Rob. 



151. Head and thorax with pubescence brownish white. Wings hyaline, the 



nervures piceous, stigma pale brown, marginal with piceous. Abdo- 

 men with interrupted fascise Kuutliiana Ckll. 



Head and thorax with the pubescence whitish or pale yellow 152. 



