A LIST OF INDIANA ANTS. 465 



Subgenus Neojormica Wheeler. 



35. F. (N.) pallide-f ulva hsitreiWe suhsp. schavfussi Mayr g — Pine; Shoals; 



Hammond; Wyandotte; New Harmony. 

 One of our commonest ants; living in rather small colonies under stones 

 or in obscure crater nests in sunny fields. It is timid and runs very rapidly. 

 Its food consists very largely of the excreta of plant lice and dead insects. 



36. F. (N.) pallidefulva subsp. nitidiventris Emery g — Hammond; Kos- 

 ciusko County; Marion County. 



Common, with habits similar to those of schaufussi. 



Subgenus Proformica Ruzsky. 



37. F. (P.) neogagates Emery 5 — Tippecanoe Lake. 



A highland or subboreal form, which nests under stones or in obscure 

 craters in rather small colonies. 



Genus Polyergus Latreille 



38. P. lucidus Mayr g —Pine. 



This rare and beautiful red ant, the "shining slave-maker" of MacCook, 

 or "shining amazon" as it may be called, uses the workers of Formica schau- 

 fussi as slaves, or auxiliaries. These are bred from pupae kidnapped from 

 their maternal nests by the war-like lucidus workers. The latter are quite 

 unable to feed themselves, excavate nests or care for their own brood, but 

 depend for these important services on the schaufussi workers. Hence the 

 shining amazons are unable to lead an independent life and may be regarded 

 as permanently parasitic on fragments of schaufussi colonies which they 

 bring together with great skill. 



Genus Camponotus Mayr. 



39. C. castaneus Latreille g 9 cf — Camelton; Pine; Vincennes; New Har- 



mony; Mt. Vernon; Grand Chain; Mitchell; Hammond; Wyan- 

 dotte. 

 This appears to be a common species in Indiana, although it is very rare 

 in the Eastern States north of New Jersey. It is easily distinguished from 

 our other Camponoti by the pure reddish yellow color of the worker and fe- 

 male forms and the pale males. It nests in the ground under stones. 



40. C. castaneus subsp. amercanus Mayr. y c? — Wyandotte; Mitchell; 



Hammond; Camelton. 

 The soldiers and workers of this form, though variable in color always 

 have the head black. It nests under stones like the typical form of the 

 species. 



41. C. herculeanus L. subsp. pennsylvanicus DeGeer g 9 (f — Delong; Vin- 



cennes; Knox; Mitchell; New Harmony; Culver; Tippecanoe Lake; 

 Grand Chain; Wyandotte; Arlington; Stark County. 



