OF WASHINGTON, VOLUME XI, 1909. 137 



pcritreme long, reaching coxae I, stigma just behind coxae III; legs 

 slender, second pair rather thicker than the others, III pair with the 

 intermediate joints slightly produced on the middle behind ; tarsus I of 

 even thickness to the tip, other tarsi tapering. Similar to L. stabulans, 

 but leg II less stout, and with fine hairs. 



Length, 1 mm. 



Guelph, Ontario, Canada ; from groundhog. 

 Several have no distinct shields on venter, although some 

 carry a large egg; they are probably nymphs. 



Laelaps longiseta, new species. 



Pale yellowish. Body nearly twice as long as broad, with many 

 bristles, and on the posterior sides and apical margin are many fine, 

 short hairs ; on each humerus is a very long bristle, and a similar long 

 one from near tip of each hind femur. The legs are rather short and 

 witli bristles and hairs; leg II of male is heavy, but without apophyses. 

 On the venter are rather fine and slender bristles, a pair at front margin 

 of sternum, one at base of coxa II, and III, and two at base of coxa 

 IV ; anal plate large and broad, with many hairs. 



Length, 0.9 mm. 



Guelph, Ontario, Canada, February 27, from carrion beetle. 



Readily known by long bristles on hnmeri, and hind femora. 





 Ggmasus posticatus, new species. 



Color yellowish. Body nearly twice as long as broad, broadest at 

 shoulders, concave and tapering in front, broadly rounded behind. 

 Dorsum with a pair of frontal bristles, a long one on each shoulder, 

 and a submarginal row of four each side, the last near tip and shorter 

 than the others ; a submedian row of seven shorter and finer hairs, the 

 first the longest, and a few others near shoulders ; two each side on the 

 posterior margin near tip, the inner one the longer, and two on the 

 posterior sides. Epistoma with three teeth in front, the median one the 

 longest; legs and palpi slender, all with long spines, leg II thickened, 

 and with a small tooth at tip of third joint beneath, leg IV extremely 

 long, very much longer than body. Sternal plate with a bristle at each 

 corner, and several on venter, especially near the anal opening. 



I A'ngth, 0.7 mm. ; leg IV, 1 mm. 



From ( iiK-lpli, Ontario, Canada, under decaying maple leaves. 



Gamasus attenuipes, new species. 



Yellow brown. Body of female much broader behind than in front. 

 The shield follows the margin for one-half way when it is cut away 

 quite suddenly, and tapers to the tip ; above with many fine, short hairs. 

 Legs extremely long and slender, all with fine hairs ; palpi long and 

 slender, last joint showing a thumb inserted near tip. Sternal plate with 



