72 HENRY SKINNER, EDITOR. 



FORMICOIDEA. 



MYRMICID.E. 



L.eptotliorax canadensis obscurus n. subsp. — Length 2-3 mm. £ . 

 Olypeus longitudinally impressed medially, the impression rather broad, some- 

 what smooth and shining, to each side there are longitudinal well-marked stripe. 

 Head longitudinally rugulosely striate, appearing finely dull striate under a low- 

 power lens, hairs very sparse, mandibles striate, five toothed, apical tooth long- 

 est. Antennae eleven jointed, scape and flagellum covered with appressed pubes- 

 cence. Prothorax reticulately striate, mesothorax rather rugulosely striate 

 closer, metathorax imperfectly reticulate, the teeth of metathorax diverging and 

 extending a little beyond the posterior border of the metathorax, the thorax dor- 

 sally bears a few scattered, thickened hairs, sides of the thorax more closely 

 sculptured, the mesonotum has the finest sculpture, that of the metanotum 

 coarsest, this distinction is apparent when viewed by a hand lens. Suture be- 

 tween meso- and metanotum distinct though not deep. Legs very sparsely 

 ciliate. first joint of petiole, as long as high, second joint wider than long, both 

 dull, finely sculptured. Abdomen shining, with sparse short hairs. Head black, 

 thorax and petiole not exactly black brownish black, abdomen black, apex of 

 segments testaceous, Mandibles, antennae and legs more or less dark ferruginous, 

 part of femora and apical joints of flagellum darker than other parts. 



Differs from the European L. acervorum by the impressed cly- 

 peus, finer sculpture and more distinct thoracic structure. This 

 has not been compared with a specimen of L. canadensis, it may be 

 specifically distinct. 



Type, Coll. Acad. Nat. Sciences, Phila. Type locality, Beulah, 

 N. M., Aug. 17, 1901 (H. Skinner). Thirteen $. 



Myrmiea rubra var. scheneki Em. 



One % , two 9 ? , two $ $ • The males and females are almost 

 entirely black, in the workers the head and abdomen are darkest. 



dolichoderim:. 



* Tapinomo sessile Say. 



(Det. Andre) (T. D. A. Cockerell). 



Lioinetopum apiculatum Mayr.— 9 Length 14 mm. — Mandibles 

 sparsely punctate, flagellujn with one joint longer than the following joint, apical 

 joint excepted. Head and thorax practically impunctate, smooth and shining, 

 sericeous, in addition the head is less and thorax more thickly covered with a 

 yellowish brown erect pubescence. Wings missing. Scale higher than wide, 

 width above one-half width of the scale in the middle, deeply emarginate. 

 Abdomen shining, minutely, closely punctate, sericeous and pubescent, fifth 

 ventral abdominal segment keeled and emarginate. 



Black. Mandibles, antennae, tegulae, coxae and tarsi inclining more or less to 

 ferruginous, apical edge of abdomen partly testaceous. 



