1 76 The Ohio Naturalist. [Vol. II, No. 3, 



margin of head l)y 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. Prothorax lenticular, lateral angles acute, 

 bearing one or two bristles ; hind margin evenly convex, with about five or 

 six bristles near middle ; meso-metathorax 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 i 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, Cathartes aura, at Ames, Iowa, 

 April 21, 1S90, and also received from Prof. I^awrence Bruner 

 from same host, lyiucoln, Nebraska. Closely related to the Col- 

 pocephalum osborni Kellogg, and agrees with that species in the 

 cin'ved brush of hairs on eighth segment in fem^ale. 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. 



Lipenrus )}iarginaUs 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 antenmt, three on each side. 

 Antennte tapering to the tips, the joints decreasing in length as well as in 

 size to fourth, fifth about as long as third. Metathorax with narrow black 

 marginal lines ; abdominal segments one to seven with narrow black border; 

 the disk of abdominal segments with long bri.stles 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. Fip. i. Menopon allrnialiint u. sp.; a. female; h, male Kf'i- 

 talia; r, ventral view, tip of abdomen, female. The figure is from a specimen which 

 shows rather too mucii contraction at base of abdomen. 



Fig. 2. Colpocephaliiin keUogf;i n. sp.; a, female dorsal view; /;, male tip of abdomen; 

 c, female ventral view, tip of abdomen. 



Fig. 3. Trichodccles nasuatis n. sp. Female. 



Fig. 4. Trichodcclcs thoracicus n. sp. a, female; /', tip of abdomen of male. 



Figures drawn by Max W. Morse. 



