*76 
The Ohio Naturalist. 
[Vol. II, No. 3 
margin of head by full length of distal joint. Palpi conspicuous, outer 
joint passing anterior border of head ; mandibles sharp ; anterior border of 
head obtusely rounded ; postero-lateral lobes broad ; a few short spines and 
two or three long bristles. Protliorax lenticular, lateral angles acute, 
bearing one or two bristles ; hind margin evenly convex, with about five or 
six bristles near middle ; meso-metatliorax widening abruptly and passing 
insensibly into abdomen, and like segments of abdomen, with marginal 
bristles; Abdomen widening to third segment ; elongate oval attenuated 
apically ; segments 1 to 7, with lateral fuscous patches confined closely to 
border, and including at extreme border a black spot or marginal border. 
Eighth segment with a comb of curved hairs at lateral margin in female, 
and inner row of about ten parallel to border on ventral side. Legs nearly 
uniform, becoming a little longer posteriorly, outer border black, with row 
of short spines. 
Males with marginal spots wider and a little more diffuse. 
Taken from the turkey buzzard, Catliartes aura, at Ames, Iowa, 
April 21, 1890, and also received from Prof. Lawrence Bruner 
from same host, Lincoln, Nebraska. Closely related to the Col- 
pocephalum osborni Kellogg, and agrees with that species in the 
curved brush of hairs on eighth segment in female. Differs 
from it in the fuscous bands being confined more narrowly to the 
margin, the more slender body, more attenuate terminal segments 
and the larger size. 
Lipeurus marginalis n. sp. 
Elongate, the margins of metathorax and abdominal segments with 
slender dark lines. Length, female, 2.5 mm. 
Head long, rounded in front, slightly narrowing apically, contracted 
toward occiput, posterior margin slightly emarginate. There are six inflated 
pockets in border of head anterior to the antennae, three on each side. 
Antennae tapering to the tips, the joints decreasing in length as well as in 
size to fourth, fifth about as long as third. Metatliorax with narrow black 
marginal lines ; abdominal segments one to seven with narrow black border; 
the disk of abdominal segments with long bristles and one or two shorter 
bristles at lateral angles. Legs with narrow black borders on outer margin 
of femur and tibia. 
This species belongs to Piaget’s group of quadriguttata, and 
approaches assessor from the condor, but is smaller and the 
markings confined to the narrow marginal lines. 
Two specimens, females, taken from the turkey buzzard, Cathar- 
tes aura, at Ames, Iowa, April 21, 1890. 
Description of Plate. Fig. i. Alenopon alternatum n. sp.; a . female; b, male geni- 
talia; c y ventral view, tip of abdomen, female. The figure is from a specimen which 
shows rather too much contraction at base of abdomen. 
Fig. 2. Colpocephalum kelloggi n. sp.; a, female dorsal view; b, male tip of abdomen; 
c, female ventral view, tip of abdomen. 
Fig. 3. Trichodectes nasualis n. sp. Female. 
Fig. 4. Trichodectes thoracicus n. sp. a, female; b , tip of abdomen of male 
F'igures drawn by Max W. Morse. 
