420 bulletin: museum of comparative zoology. 



place a very small, pilose process resembling a diminutive additional 

 article (Plate 1, fig. 2) ; in the male sparsely clothed with long bristles 

 and densely with finer short hairs; in the female the legs are also 

 crassate but less strongly so than in the male and they are more uni- 

 form in thickness. 



Pairs of legs in male 33-59; in female 53-63. 



Length of type male 27 mm.; width ad. 9 mm. 



Localities. — Chatham, Va. ; Landrum, Seneca and Taylor's, 

 S. C; Hot Springs and Brown's Summit, N. C; Lexington and 

 Fulton, Ky.; Gainsville, Lula, Tallulah Falls, and Atlanta, Ga. ; 

 Anniston, Ala.; WaterValley, Miss. 



The specimens described are mainly from Chatham, Va. The 

 specimens from this and several other of the more northerly locations 

 seem to have the number of pairs of legs almost fixed at 53 in both male 

 and female; but in those from other localities, such as Seneca, S. C, 

 the mode is higher although the specimens otherwise agree closely. 

 As previously indicated this species is very close to bipuncticeps and 

 the large individuals except upon critical examination are scarcely 

 to be distinguished; this is shown by the fact that they seem always 

 heretofore to have been confused with that species. In many places 

 both bipuncticeps and watsingus may be secured in the same area; 

 but usually one will be found to prevail to the exclusion of the other. 

 In many places toward the north of our range, ivatsingus seems wholly 

 to replace bipuncticeps, while in other large areas the latter alone 

 occurs. In Illinois, Iowa, etc., watsingus does not occur, bipuncticeps, 

 on the other hand, being there much the commonest geophilid. 



CHILENOPHILINAE. 



Watophilus, gen. nov. 



Frontal suture not evident. Prebasal plate absent. Dorsal plates 

 bisulcate. 



Labrum free, tripartite, the middle piece fully separating the lateral 

 and armed along the free edge with a row of small spines or spine-like 

 teeth; the lateral pieces with fewer, larger processes, or spines. 



First maxillae with coxae completely fused at middle, separated 

 by suture from distal divisions; palpus biarticulate, the coxa and 

 femur on outer side with very long membranous lappets. 



Second maxillae with strongly developed chitinous thickening or 



