3 6 
The Ohio Naturalist. 
[Vol. VII, No. 2, 
5. Physostomum cherriei sp. nov. 
Female (Fig. 1, E.). Length 3.4 mm., width .9 mm.; except 
the pitchy brown sub-marginal lateral bands on abdomen and 
similarly colored blotches on head and thorax, it is of very 
uniform pale-brown. 
Head, length .78 mm., width .62 mm.; evenly rounded in 
front and rather broad, widening toward posterior, the lateral 
margins nearly straight; ocular notch small with three small 
hairs, fleck wanting; temple clear, with two small hairs and two 
large bristles alternating, posterior angle just pereeptiblv out- 
turned ; occipital margin broadly concave with narrow sub¬ 
marginal band; palettes of medium size, light-brown backward- 
curved band behind; two curved, brown blotches between anten¬ 
nal fossae and labral lobes; antennal fossae with narrow dark- 
brown curving line near minor border; palpi not extending 
beyond margin of head; clypeal suture marked by pale band. 
Thorax, length .88 mm., width .73 mm.; prothorax broader 
than long and narrower than head; anterior and posterior mar¬ 
gins concave, lateral and posterior angles rounded, the former 
with a short and a medium length bristle, the latter with one 
long bristle; a short thick bristle nearlv opposite temporal angle; 
dark-brown bands extend from anterior to posterior part, being 
marginal half the distance back, the rest of the way submarginal; 
a narrower and paler band on each side of the median line 
extends nearly full length of prothorax with slight outward 
curve; narrow dark bands in posterior half extend obliquely 
backward toward median line; marginal extensions pale brown. 
Metathorax longer and wider than prothorax, anterior part 
covered by it; width a little less than length; anterior margin 
rounded then incurved at middle of lateral margin, which then 
diverges to posterior angle; posterior angle with one short and 
one long bristle; anterior rounded margin with three small 
bristles; dark-brown marginal bands extend along anterior 
border halfwav back then curve in, cross the straight sub¬ 
marginal bands running whole length of metathorax, and then 
curve forward to a point two-thirds from posterior margin. 
Legs of pale-golden color. 
Abdomen, with sides only slightly swelling widest at middle, 
last segment evenly rounded, with border of genital opening 
slightly extending; segments of nearly equal length and trans¬ 
verse sutures straight except last three which are posteriorly 
convex; posterior angles have long bristles, last segment with 
two shorter bristles on each side half way from median line, 
genital extension with fringe of fine hairs; lateral line dark- 
brown with band of lighter brown extending to margin of body 
