WILLIAM G. DIETZ 137 



Abdomen testaceous, an obscure, interrupted dorsal line, broad and con- 

 spicuous black lateral stripe and posterior margin of segments, dark brown; 

 eighth segment entirely blackish-brown, stcrnite with deep V-shaped incision 

 enclosing a paler, median appendage. H\^)opygium, except the ninth tergite, 

 yellowish; the latter brown, rounded latcro-posteriorly, lightly impressed in 

 front and behind and slightly emarginate in the middle, outer appendages 

 elongate — lanceolate, anticlinal; ninth sternite deeply emarginate, each side 

 anteriorly with a strongly curved, daw-like process, directed dorsad. PI. VII, 

 fig. 33. Pleural suture straight, abbreviated. 



Female. Length, 19 mm.; wing, 13.5 mm. 



Similar to the male. Head orange-yellow. Antennae short, flagellar seg- 

 ments slightly emarginate beneath, setae of verticels shorter than the respective 

 joints. The thoracic stripes arc less infuscated anteriorly and the pleural 

 markings paler; the dark .spot on the metapleura is absent. Dor.sal stripe of 

 abdomen, blackish and vminterrupted; the lateral stripes and the black mar- 

 gins of the segments, here and there interrupted. Ovipositor ferruginous; 

 dorsal valves very narrow, not very long; the ventral valves broader and 

 nearly the length of the upper valves. 



Holotype: cf ; Wyalusing, Bradford County, Pennsylvania. 

 August 2, 1916. (W. G. Dietz.) 



Allotype: 9 ; topotypic. 



Paratypes: four females, topotypic. 



Closely resembles P. cingulata, Init differs in the flagellar joints 

 being dark brown at base. Thoracic stripes distinct and the wings 

 more grayish. From P. hrevicornis Loew, it differs in the abdom- 

 inal markings. 



Pachyrhina stigmatica spec. n. (PI. V, fig. 20; pi. VII, fig. 34.) 



Honey-yellow. Antennae — male — short, flagellar joints, except the first, 

 bicolored, yellow at base. Thoracic stripes dark-ferruginous. Stigma dark 

 brown. Abdomen with dorsal stripe and lateral and ventral rows, of btack 

 spots; eighth sternite produced, not emarginate. 



Male. Length, 14 mm.; wing, 12.5 mm. 



Head concolorous; frontal prolongation shining, darker anteriorly, the 

 hairy vestiture rather long, dark, nasus long, infuscate. Mouthparts and 

 basal joint of palpi brown, remaining palpal joints brownish-yellow, the last 

 joint a little longer than the others (•()ml)ined. Sides of proboscis browiiish. 

 Face and .scapal joints of antennae pale yellow, flagellar joints slender, cylin- 

 droidal, brown, yellow at base; verticels complete, setae long; pubescence 

 whitish. Occiput shining, somewhat tinged with fuscous on the sides and an 

 ill-defined brownish spot each side near the orbital margin. 



Thorax concolorous, shining. Pronotal scutum broatlly brownish in middle 

 portion, which is continued as a stripe upon the neck to ba.'ie of occiinit. The 

 middle thoracic .stripe narrowed posteriorly and divided by a pale line, lateral 



TRANS. A.M. ENT. SOC, XLIV. 



