Pe ie Seer eee ey eee ee eS yey ee 
7 pa z ji = ee ey e 
1893.] Entomology. 61 
closely approximated short bristles arising from the same papilla on 
lateral dorsal surface of thorax a little anterior to middle; a bristle 
below these on pleural surface, another still below and a little anterior 
to this one. Wing cases reaching about to base of third abdominal 
segment, leg cases a little longer. Scutellar segment about as wide as 
thorax, with a transverse row of ten or eleven long, more or less 
curled hairs on each side of dorsum approximated to anterior margin, 
there being a bare space on median portion of segment between the 
inner ends of the rows; about ten somewhat longer similar hairs on 
extreme Jateral portion of segment on each side, arranged in a more 
or less complete semicircle, the open portion of the semicircle being 
toward the posterior end of body; the lateral hairs are longer and 
slightly stouter than those of dorsum, being nearly as long as trans- 
verse width of segment. Abdominal segments one to four, about same 
width as scutellar segment, each armed on dorsum with a transverse 
row of short longitudinal parallel chitinous ridges or very narrow 
plates, there being thirteen in a row on first and second segments, 
twelve on third segment, and nine on fourth, the rows a little approxi- 
mated to posterior margin of segment, especially in middle; these 
ridges are about two-sevenths as long as length of segment, those in 
middle of rows being the largest and heaviest, the outer ones shorter 
and diminishing in size, those on fourth segment less heavy than those 
of first to third segments, and each ridge is produced at its ends into 
a spinous or hook-like process, the ridges in profile presenting a cres- 
-centic appearance with the concavity uppermost. The other abdomi- 
nal segments without these rows of ridges, fifth segment nearly as wide 
as preceding, sixth segment hardly narrower than fifth, the fifth and 
sixth segments each with a transverse continuous row of hairs on 
dorsum arising from a transverse ridge, extending down to lateral 
ventral edge of segment and continued on sides of venter, these rows 
somewhat approximated to posterior margin of segment. Segments 
(abdominal) one to four with a thin transverse row of shorter weak 
hairs on each side of dorsum, arising in posterior edge of rows of ridges, 
extending down on each side to lateral margin, no hairs on median 
dorsal portion ; same segments with a more or less complete lateral 
semicircle of longer hairs as on scutellar segment, but somewhat 
weaker and shorter than those on that segment, the hairs on fourth 
segment extending beneath on sides of venter. Seventh abdominal 
segment much narrowed, rapidly and evenly narrowiug from 
posterior margin, its width on posterior margin hardly more than one- 
third its width anteriorly, its mean width about one-half that of sixth 
