2 2 University of Michigan 



Colombia: Fundacion, one male taken "under bark of a log 

 in the forest," August 14, 1913. Type, M.C.Z., 2184. 



A species like lesnei Brolemann and Ribaut in having all 

 ventral pore areas undivided, but differing in the presence of pores 

 on the penult sternite. In having pores on the sternites from the 

 second to the penult inclusive similar to the Brazilian species 

 perditus Chamberlin and baker i Chamber lin, but these species 

 have the prebasal plate exposed, the head longer, the legs fewer, etc. 



Schendylurus labbanus, sp. nov. 



Plate IV, Figs. 20 and 21 



Cephalic plate widest in front of middle, longer than wide in 

 ratio 7:6. Anterior corners oblique. Anterior margin straight. 

 Posterior margin straight or very weakly incurved, wider than the 

 anterior margin. 



Joints of antennae rather short, the fourth longer than wide 

 nearly in ratio 7:6. 



Prelabral region with setae few, only four, or possibly six, 

 occurring in one series caudad of the postantennal pair, the arrange- 

 ment thus being i + i and 2+2 or 3+3. The usual area of smaller 

 polygonal reticulations between and near the median setae of the 

 second series. 



In contrast with the very wide median arch of the labrum of 

 the preceding species, in the present form the median region is 

 deep and comparatively short with the lateral pieces correspond- 

 ingly long, as more usual in e.g., Adenoschendyla. The distance 

 between ends of median arc about one fourth, or a little less, the 

 total width of labrum. Median arc with thirteen teeth, each 

 lateral portion with five or six teeth, these with more slender tips 

 as usual (Plate IV, Fig. 21). 



Dental plate of mandibles in three sections or blocks, these 

 bearing respectively three, three, and four teeth, a total of ten. 



