502 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.50. 



cone. Unguis (fig. 183) stout, slightly curving, with inner margin 

 unidentate one-third from the base. Tenent hair single, long, clavate. 

 Tenaculum tridentate. Dentes stout, swollen dorsally, with coarse 

 dorsal tubercles (fig. 184). Mucrones (fig. 185) two-fifths as long as 

 dentes, subcrescentic, with large outer and inner lamellae and deep 

 acute incision between the outer lamella and the apex. Clothing of 

 spai-se short curving setae (fig. 186), with longer and stiffer setae on 

 the posterior part of the abdomen. Length, 3 mm. 



Urbana, Illinois, May 9, in a damp log. 



Coty'pes.—C&.t. No. 19905 U.S.N.M. 



Genus ODONTELLA Schaffer. 



Odontella Schaffer, 1897. — Agren, 1904. — Borner, 1909 — (Axelson) Lin- 



naniemi, 1912. 

 Xenyllodcs Axelson, 1903a (part). 



Body stout. Mouth parts suctorial, projecting in the form of a 

 cone. Eyes five on each side. Postantennal organ with four (five 

 in 0. thauma Borner) peripheral confluent lobes. Antennae shorter 

 than the head, four-segmented. Unguiculus absent. Furcula not 

 reaching the ventral tube. Mucro with two pocketlike dorso-lateral 

 lobes. Anal spines absent, or represented by two or more modified 

 abdominal tubercles. Integumentary tubercles coarse, tooth or thorn- 

 like. 



ODONTELLA EWINGI, new species. 



Plate 21, figs. 187-197. 



Eye patches black, oval. Eyes (fig. 187) five on each side. Post- 

 antennal organ (fig. 188) with four peripheral confluent lobes, of 

 which the posterior is shorter than the others. A median pseudo- 

 ceUus occurs near the postero-dorsal margin of the head. On each 

 side of the head are six to eight stout conical spines (figs. 189, 190). 

 Antennae shorter than the head, stout; segments as 2:3:2:2 in rela- 

 tive lengths ; the two basal segments four times as broad as long and 

 contiguous. Buccal cone (fig. 190) half as long as the head. Several 

 stout conical spines, similar to those of the head, occur on each of 

 the legs ; there being one on each trochanter and one on each femur 

 (fig. 191). Long outstanding hairs occur on the legs, as in figure 

 191. Tibiotai-sus divided into two segments by an obsolete suture 

 (fig. 191). Unguis (fig. 192) stout, with a long slender tooth at the 

 base of the inner margin, and a pair of prominent baeal lateral teeth 

 (fig. 193). Dentes stout, bearing dorsally two setae and three stout 

 spines (fig. 194). Mucrones (fig. 194) ahnost as long as dentes, 

 slightly longer than hind ungues; outer lamella modified to form 

 two large oblique pocketlike lobes ; inner lameUanaiTOw; apex spoon- 

 like. Setae of the body (fig. 195) sparse, recurving, mostly short, 



