464 PROCEEDINGS OF THE INDIANA ACADEMY OF SCIENCE. 



distinguished from the species of Lnsius sensu slricto and Acantho)nyops by 

 their peculiar and rather agreeable odor like that of oil of citronella or lemon 

 verbena. L. claviger nests under old logs or stones in open woods. 



28. L. (A.) latipes Walsh S — Belong. 



This species has two kinds of females, one of which has the legs much 

 flattened and dilated and the hind tibiae shorter than the fore tibiae, while 

 the other resembles the female of claviger. 

 Genus Formica L. 



29. F. truncicola Ny lander subsp. obscuriventris Mayr S — Tippecanoe 



Lake. 

 This species forms populous colonies in woods under stones, which it 

 banks with vegetable detritus. 



30. F. truncicola subsp. inlegra Nylander S — Camel ton; Wyandotte. 

 The largest and most conspicuous of our eastern forms of truncicola, 



forming great colonies, often comi)rising several nests under piles of stones, 

 in old logs, etc. The ants stuff all the crannies of their abodes with bits of 

 dead leaves, grass, etc. Like most other species Formica inlegra is much 

 given to attending aphids. It is most abundant in hilly regions, where it 

 prefers sunny glades or clearings in forests. 



3L F. ulkei Emery S — Tippecanoe Lake. 



This species, originally described from South Dakota, belongs to the ]>oreal 

 fauna. It is known also to occur in Illinois, Nova Scotia and New Bruns- 

 wick. It constructs rather flat mound nests smaller than those of the mound- 

 building ant of the AUeghanies {F. exsecloides Ford) which very probably 

 also occurs in Indiana. 



32. F. ulkci var. hehcsccns Wheeler S — Bass Lake; Stark County. 



This form was originally described from specimens sent me by Mr. Blatch- 

 ley from these localities. 



33. F.fusca L. var. subsericea Say g — Camelton; Hammond; Veedersburg; 



Wj'andotte; Vawter Park; Arlington; Pine; Culver; Tippecanoe 



Lake; Shoals; Bass Lake. 

 With the exception of Lasius americanus, this is llie most abundant of 

 our ants. It is easily recognized by its deep black color and silky pube- 

 scence. It prefers sunny, grassy places and either constructs flat, dome- 

 shaped mounds, which are largest and most definite in outline in the Middle 

 Western States, or excavates its galleries and chambers under stones, logs, 

 etc. It is a very cowardlj^ insect, e.xcept when living in large colonies. 



34. F. cincrca Mayr var. neocinerea Wheeler 9 — Wilders. 



Not hitherto known to occur east of northern Illinois where it is common 

 (Rockford, Chicago). It lives in open grassy places, often in boggy meadows, 

 usually in nests like those of F. subsericea. 



