506 PROCEEDINGS OF THE ACADEMY OF [Sept., 
vitreous spot before the stigma extending from cell 1st Ri into the 
base of cell M4. Venation as in other members of the hicornis group, 
but the cell 1st M2 is large and less regularly pentagonal (see Plate 
XVII, fig. 20). 
Abdominal tergites bright yellow; a narrow median brown vitta 
beginning on the base of segment two extending through segment 
six; segments seven and eight yellow, indistinctly brown medially; 
the ninth tergite is dark brown, pale medially on the caudal half 
above; an indistinct sublateral band beginning midlength of the 
second segment, ending on the seventh segment, on the last three 
segments oblique; lateral margins broadly, caudal margins narrowly 
yellowish silvery; sternites dull yellow, narrowly margined with 
silvery; ninth pleurite and sternite dark brown. Male hypopygium 
(see Plate XVIII, fig. 40) with the ninth tergite (see Plate XIX, 
fig. 58) tumid, though not very high, the caudal margin almost 
transverse with an indistinct median impression; no horns or lobes 
on the tergite; the ventro-caudal margin on either side of the middle 
line is produced into a flattened edge whose ipner angle is blackened, 
chitinized, and sparsely denticulate. Ninth pleurite complete, 
extensive; the caudal margin is produced into a broad, flattened 
process directed caudad and slightly dorsad and entad; outer pleural 
appendage small but prominent for this group of species, elongate- 
cylindrical, pale with a few scattered long hairs; inner pleural 
appendage a flattened blade which is broad basally, narrowed into 
a subacute point, the caudal margin ciliate with long yellow hairs. 
Ninth sternite extensive, the dorso-caudal angle produced entad 
and slightly ventrad; this process subacute and slightly chitinized; 
l)eneath this a shorter lobe with a fringe of long yellow hairs, those 
at the distal end curled and twisted. The gonapophyses are very 
long, subequal to the penis-guard which they subtend; the tips of 
the gonapophyses slightly divaricate, the distal two-thirds with a 
fringe of stout yellow hairs on the ventral face. Eighth sternite 
extensive, the caudal margin subtransverse with four slight tubercles, 
each bearing a dense tuft of long yellow hairs; the lateral brushes 
surround a powerful decussate reddish bristle. 
Habitat. — Northeastern United States. 
Holotype, cf , Dummcrston, Vermont; July 14, 1908 (Johnson). 
The type is in the collection of the Boston Society of Natural 
History. 
The species is dedicated very respectfully to Mr. Charles W. John- 
son, the collector of the type specimen. 
