Il6 PERGAXDE [5 2 ] 



distinctly yellowish or greenish in a certain light, front of head as far 

 as the eyes, the clypeus, cheeks, and under side of the head, sides of 

 the thorax, the antennae and legs, lighter or darker ferruginous; apex 

 of the joints of the flagellum dark brown; mandibles red, their ex- 

 ternal edge and the teeth, as well as the eyes, black ; palpi yellowish. 

 Appressed pubescence yellowish and rather dense on the head and ab- 

 domen; erect hairs quite profuse, yellowish or brownish in certain 

 lights; those of the clypeus, the under side, and end of the abdomen 

 much the longest; there are but a few erect hairs on the scape, the 

 femora and tibia?. Punctuation of the head, thorax, and abdomen 

 minute and dense, those of the mandibles rather coarse. Scale stout, 

 its upper edge arcuated. 



This ant, as far as I have been able to ascertain, does not agree with 

 any of the various forms comprising the group L, niger, which have 

 thus far been described, but appears to be nearest related to one of the 

 forms of Lasius subniger, inhabiting Maine, though it is almost 

 twice as large and much darker and with the eyes more elongated ; the 

 general appearance of this ant is very similar to that of Lasius aliena. 



Twenty-five specimens, taken at Sitka during June. 



Type. Cat. no. 52771 U. S. National Museum. 



Subfamily MYRMICINI. 



Leptothorax yankee Em. var. kincaidi var. nov. 



Female: Length about 4 mm. Head and thorax black, the abdo- 

 men dark brown, with the posterior edge of the segments brownish 

 yellow; antenna?, mandibles, and legs yellowish red, the neck and 

 paler parts of the nodes of a darker red; the flagellum grows gradu- 

 ally darker towards the end, with the last joint black; femora dark 

 brown, their base and apex yellowish red; teeth of mandibles black. 

 Head finely striated, the stria? most distinct in front of the eyes and 

 between the frontal carinae; the posterior half of the head is finely and 

 rather densely rugose or reticulate, the clypeus is almost smooth 

 and the mandibles striato-punctate ; pronotum and mesonotum quite 

 coarsely rugose, the metanotum, scutellum and upper surface of nodes 

 finely, though rather indistinctly, striated; declivity of the metathorax 

 transversely striated. Abdomen smooth. Erect hairs short, truncate 

 and pale yellowish, those of the nodes and abdomen longest; there are 

 also a few much finer, erect hairs on the femora. 



The female resembles somewhat that of L. yankcc, which, how- 

 ever, is somewhat smaller, the last antennal joint and metanotal spines 



