39^ Bulletin American Museum of Natural History. [Vol. XXI, 



3- instead of 6-jointed maxillary palpi in the worker and female phases, 

 have a peculiar and rather agreeable odor like oil of citronella, quite 

 unlike the odor of the typical Lasii. They all form large colonies and 

 lead a subterranean, aphidicolous existence. L. interjectus is the 

 largest species of the genus. It is found nesting in old logs and 

 stumps in open woods and occasionally makes rough mounds or 

 merely excavates its galleries under large stones. The mound nests, 

 like those of L. aphidicola, often attain considerable dimensions in 

 Wisconsin and Illinois where interjectus seems to be more abundant 

 than in the Eastern States. 



67. L. (A.) claviger Roger. — Caldwell (Cresson) ; Camden Co. 

 (Smith); Merchantville (Daecke) ; Riverton (Viereck) ; Fort Lee, 

 Lakehurst, and Halifax (Wheeler). 



This is the commonest of our species of Acanihomyops. It nests 

 under stones along the edges of woods where there is plenty of warmth 

 and moisture. The males and wingec^ females may be found in the 

 nest as early as Aug. 25, though the nuptial flight may not occur 

 till a month later. 



68. L. (A.) claviger subglaber Emery. — As this subspecies is found 

 near New York City I believe there can be no doubt of its occurrence 

 on the western bank of the Hudson. It may be distinguished from 

 the typical claviger in all three phases by its somewhat smaller size. 

 The hairs on the gaster and thorax of the female are shorter and less 

 abundant than in the type. 



69. L. (A.) latipes Walsh. — Camden (Smith) ; Weymouth (Daecke) ; 

 Fort Lee (Wheeler). 



This species is rather common in grassy fields under large stones. 

 Mr. J. F. McClendon and myself have shown 1 that some colonies 

 have two kinds of females. One of these (the /^-female) is very 

 hairy, has much flattened femora and tibiae, and the hind tarsus is 

 shorter than the hind tibia. The other (a-'female) is intermediate 

 in structure between the ^-female and the female of L. claviger. 



70. L. (A.) murphyi Forel. — There can be little doubt that this 

 interesting species, hitherto known only from North Carolina, occurs 

 in New Jersey. In the Angus collection of the American Museum of 

 Natural History there are a number of specimens of all three phases 

 collected at West Farms, which is now a part of Greater New York, 

 and I have taken females, that had just descended from their nuptial 

 flights, at Cold Spring Harbor, Long Island, and at Mount Kisco, 

 New York. 



* Dimorphic Queens in an American Ant {Lasius latipes Walsh). Biol. Bull., Vol. iv, pp. 149— 

 163. 3 figs. 



