1887.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 333 



12. Mecistocephalus foveatus, spec. uov. 



Orauge, polished, with au iuterrupted fuscous band ou the caudal 

 two-thirds of the dorsum. Head orauge. Cephalic plate 1.J9""" by 

 .77""", dee])ly punctate, pilose, caudad; the lateral margins are con- 

 tracted abruptly, and the cephalic plate is extended into a very short 

 neck, with the caudal margin truncate, and marked with very closely 

 set impressed lines. Antennae 2.0"™ long, pilose, the hairs distad longer 

 thau in allied species. Labium very profoundly punctate, plainly cau- 

 alicuate, pilose, and very sharply emarginate, the labium cephalad ex- 

 tending into two sharp teeth. Mandibles pilose, less deeply punctate 

 than the labium, two-toothed, the cephalic black, the caudal one orange, 

 and therefore inconspicuous. Sterna-episternal sutures and elongate 

 mesal depressions plain. Scuta-episcutal sutures plain. Legs, 43 pairs, 

 very long, pilose. Caudal legs not modified except in length, the for 

 mer being 1.08""" long, the pair just cephalad .80™™. Many hairs on all 

 the legs as long as the joints. Length, 23.31'"™; width, .94™'". 



Found near Bloomingtou, Ind. Two specimens in the collection. 



13. Scolopocryptops nigridius, spec. uov. 



Olive-brown, cephalic and caudal segments and appendages reddish 

 brown. Cephalic margin of the labium straight and very slightly 

 emarginate. Caudal legs with the first tarsal joint sparsely and sec- 

 ond and third densely villose. Tarsal joints of the three or four pairs 

 ■of legs cephalad to the caudal pair more or less villose. Apex of the 

 caudal scutum depressed, giving it the appearance of being slightly 

 emarginate. Dorsum smoothly rounded, without any indication of 

 laterodorsal carina. Length, 26.5™™ to 29.5™™. The thirty-five speci- 

 mens I have examined are very constant in size, colors, and other 

 characteristics. This species evidently occupies a position intermediate 

 between S. sexpinosa and S. gracilis, having the straight, slightly emar- 

 ginate labium of the first and the villose tarsi of the second. In gen- 

 eral appearance it strougly resembles a large Litliolmis, and its habits 

 are those of. Lithohins rather thau of tioolopocryptops. 



Found near Bloomingtou, Ind. 



14. Cryptotrichus caesioaunulatus (Wood). Plate xii. 



I have examined seventy specimens taken without selection from the 

 two hundred or more found in Monroe County, and about oue in ten 

 proved to be males. The eight pairs of legs are modified as follows : 

 Joints six, i. e., femur and tibia, aud four tarsal joints united to form a 

 hook. The basal joint is slightly lengthened and curved upward nearly 

 parallel to the body. The tibia is compressed, and gradually enlarged 

 to a point one-third its length from the distal end ; from this point it 

 is abruptly constricted so that the diameter of the proximal and distal 

 ends is about the same. The enlargement of the tibia is ou its ventral 

 side and ends in a tubercle which does not bear a seta. The four tarsal 

 joints (with the distal third of the tibia) form a semicircular hook tipped 

 with a normal claw. The two proximal joints of the hook are equal in 



