4 NORTON, 



ing yellowish green hair. Legs black, and with the body 

 sparsely covered with short pale erect hair. 



Worker minor. Length, 0.22 in. The head about 

 half the size of the preceding, slightly wider than thorax, 

 somewhat rounded and scarcely emargiuate behind ; man- 

 dibles formed as in the major workers, but not so wide. 

 (Four majors ; three minor workers.) 



Polyrhachis arboricola Norton (nov. sp.). 



Worker major. Length, 0.20 in. Color dull black; 

 form short and stout. Head nearly twice as wide as tho- 

 rax, deeply emarginate behind, distinctly 

 and closely punctured ; eyes round. An- 

 tennse inserted below the line of eyes ; 

 joints of flagellum incised, basal radicle 

 and flagellum ferruginous. Thorax with 

 a strong spine on each side before, mid- 

 dle lobe prominent, quadrate, with dis- 

 tinct edges ; metathorax subtriangulate, 

 widest behind, with sharp angulate cor- 

 ners, but no spines, abrupt on all sides. 

 Node oval, emarginate, with one sharp 

 spine on the summit. Abdomen almost round, covered 

 with abundant silky hair, the whole body with long whit- 

 ish hair. Anterior legs below the knees piceous. 



Polyrhachis strigata Norton (nov. sp.). 



Worker major. Length, 0.16 inch. Color black, the 

 antennsB and legs honey-yellow. Antennae inserted low 

 down the face, widely separated. Head rounded behind ; 

 eyes round. Mandibles rufous, triangular. Thorax ovate, 

 contraction behind gradual, separation of lobes indistinct. 

 Node nearly spherical ; basal segment of abdomen as long 

 and wide as the next. The whole body from nasus to 

 anal segment covered with coarse longitudinal striae ; they 

 pass around the node, the circles diminishing to the sum- 

 mit. Legs short, pale at joints ; femora and tibiae 

 swelled in middle. 



Var. Color wholly ferruginous. The antennae and 

 legs honey-yellow. 



