594 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



more than a variety. Its habits, according to my observations, are 

 very similar to those of aphidicola. 

 Colebrook (W. M. W.). 



Subgenus Acanthomyops Mayr. 



L. (A.) interjectus Mayr. 



The yellow Lasii of the subgenus Acanthomyops, besides 

 having only 3- instead of 6-jointed maxillary palpi in the worker 

 and female phases, have a peculiar and rather agreeable odor like 

 lemon verbena, and 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 occa- 

 sionally makes rough mounds or merely excavates its galleries 

 under large stones. 



Connecticut (Mayr) ; Colebrook (W. M. W.). 



L. (A.) claviger Roger. 



The commonest of our species of Acanthomyops, nesting under 

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

 and moisture. The males and winged females may be found in 

 the nests from the middle of August till the latter part of Sep- 

 tember. 



Connecticut (Mayr); Colebrook (W. M. W.). 



L. (A.) latipes Walsh. 



Rather common in grassy fields under stones. It has been 

 shown by Mr. J. F. McClendon and myself that some colonies of 

 this ant have dimorphic females. One of these females (the 

 /3 -female) is very hairy, and has much flattened femora and tibiae. 

 The other female (the a. -female) is intermediate in structure 

 between the /3-female and the female of claviger. The males 

 and winged females are found in the nest during the latter part 

 of August. 



Colebrook (W. M. W., J. F. McQendon). 



Formica Latreille. 

 Key to Species. 

 I. Clypeus with a notch in middle of anterior border (F. 



sanguinea) j 2 



Clypeus without a notch in its anterior border 4 



