216 Journal New York Entomological Society. [Voi. xviii. 



shows very little variation in color. The apical half of elytra is 

 always darker than the basal half, in some specimens, however, the 

 dark color becomes gradually paler towards apex. While in some 

 specimens all the striae are equally and distinctly impressed and 

 geminate, in others the alternate striae are more faint than the rest and 

 the intervals are nearly equal. These latter must resemble the Central 

 American sfriatus and insolittis which were described each from a 

 single specimen. 

 9. Lagmophloeus denticornis Casey, Trans. Am. Ent. Soc, Vol. XI, p. 94. 



I am unable to find any difference between a specimen of this 

 species from Texas in my collection and the description and figure of 

 the Central American L. addcndns Sharp.* 



THE NORTH AMERICAN FORMS OF CAMPONOTUS 

 FALLAX NYLANDER.t 



I By William Morton Wheeler. 



Boston, Mass. 



Among the ants common to Eurasia and North America, Caiiipo- 

 notus fallax Nyl. is as noteworthy for its ability to form local races 

 and varieties as it is for the monotony of its habits. Unlike the 

 much larger C. hcrcideanus L., which exhibits a similar though less 

 pronounced variability, it shows little or no tendency to invade alpine 

 or boreal regions, but seems to have a decided preference for the 

 warmer or subtropical portions of the north temperate zone. In the 

 Old World it is not uncommon in Japan, northern India, central and 

 southern Europe; in America it occurs throughout the United States, 

 but is most abundant on the Gulf coast. I have seen no specimens 

 from the colder portions of British America or from higher eleva- 

 tions in the Rocky Mountains. 



For many years C. fallax has been passing in the literature as 

 C. marginafus Latreille, but Emery has recently shown that the 

 species should bear the name originally given by Nylander to speci- 



* Biol. Cent. Am. Col., Vol. II, pt. i, p. 529, pl- XVI, fig. 24. 

 t Contributions from the Entomological Laboratory of the Bussey Insti- 

 tution, Harvard University, No. 31. 



