|Common name: no accepted
common name, listed here as 'Morrison's black-letter dart.'
Identification: Rfw 15.64 mm, fw ground color variable, can be more
pallid than specimen shown at right; costal margin usually shaded with
ochre; black before and between ordinary spots, orbicular an open 'u'
shape; median area darker than basal or subterminal area. Ptagiae
with a pale transverse stripe separating grayish base from black distal
portion. Frons smooth, pro-tibiae without sclerotized setae.
Similar species: 10674,
11006, 11007, 11017, and 11022.
Distribution: western North America from southern Canada to
northern Arizona, eastward in the north to the eastern edge of the Great
Hosts: Larvae feed on Poaceae-- grasses (Crumb 1956).
ND Cass Co., Fargo. UV lt. trap.
15- VI- 1985. G. Fauske.
Lateral view of head of P. exertistigma
showing tufting on labial palpi.
Dorsal view of head and prothorax of P. exertistigma
showing pale edged black vertex and pale transverse stripe on ptagiae.