484 bulletin: museum of comparative zoology. 



67. F. exsectoides exsectoides var. davisi, var. nov. 



Worker. Length 4.5-7.5 mm. 



Differing from the worker of the typical form only in having the 

 posterior portion of the head and the dorsal portion of the pro- and 

 mesonotum distinctly infuscated, at least in many of the workers of 

 all sizes in the colony. 



Female (dealated). Length 9-11 mm. 



Gaster red like the thorax and head and transversely banded with 

 black, owing to the anterior and posterior border of each segment 

 being of this color. 



Described from a number of workers and dealated females taken at 

 Newfoundland, N. J., by Mr. Wm. T. Davis. I have also taken this 

 same form at Natick, Mass. Its validity as a variety will have to be 

 tested by further study of the species. Possibly the color of the gaster 

 in the queens is due to old age. It is, however, constant in twenty-one 

 specimens taken from twelve different nests in New Jersey and fully 

 thirty females from as many nests in Massachusetts. 



68. F. exsectoides exsectoides var. hesperia, var. nov. 



Worker. Length 4.5-6 mm. 



Differing from the typical form in the shape of the petiole, which is 

 much narrower, lower and thicker, with the anterior surface convex, 

 the posterior flattened, and the border, though sharp, not being blade- 

 like, or cultrate. Seen from behind it is truncated and like the petiole 

 of F. dakotensis in outline. The posterior corners of head, ocellar 

 triangle, and a spot on the pro- and mesonotum fuscous. The red 

 color of the body is a little more brownish and the legs darker than in 

 the typical form. Frontal area rather opaque. 



Described from twenty-eight workers which I took from a single 

 colony nesting under a cluster of stones in Cheyenne Canyon, near 

 Colorado Springs, Colo. 



69. F. exsectoides opaciventris Emery. 



F. exsectoides var. opaciventris Emery, Zool. jahrb. Syst., 1893, 7, p. 653, S ; 

 Wheeler, Bull. Amer. mus. nat. hist., 1906, 22, p. 405. 



Worker. Length 4.5-6 mm. 



Differing from the typical exsectoides in having the antennal scapes 

 distinctly thickened at their tips and in the greater abundance of the 



