wheeler: ants of the genus formica. 557 



Illinois: Algonquin (W. A. Nason); Rockford (Wheeler). 



Colorado: Manitou, Colorado Springs, Colorado City (Wheeler). 



New Mexico: Las Vegas (Wheeler). 



Quebec: Hull, near Ottawa (Wlieeler). 



Ontario: Grimsby (W^heeler). 



Emery regards as the type of this subspecies " workers, which have 

 about the color of the subsp. schaufussi," but such individuals are too 

 pale to represent the subspecies properly, which is decidedly darker. 

 It is in fact often so dark as to merge into fuscata. Such transitional 

 forms are also cited by Emery from South Dakota but he evidently 

 regarded them as fuscata. Emery refers the male and female described 

 as schaufussi by Mayr to this subspecies. 



F. nitidivcntris closely resembles schaufussi and inccrta in habits, 

 but nests in more shady situations, along the borders of woods, etc. 

 In geographical range it seems to coincide very closely with incerta, 

 from which it is sometimes distinguishable only with difficulty. 



138. F. (N.) PALLiDEFULVA NiTiDiVENTRis var. FUSCATA Emery. 



F. pallidefulva subsp. fuscata Emery, Zool. jahrb. Syst., 1893, 7, p. 656, ^ 9 . 

 F. pallidefulva nitidiventris var. fuscata Wheeler, Bull. Amer. mus. nat. hist., 

 1904, 20, p. 370. 



Worker. Length 4-6 mm. 



Characterized by deeper coloration and feebler pilosity. The body 

 is dark reddish brown or blackish, the anterior portion of the head and 

 legs paler ; mandibles, antennae, tarsi, tibiae, and articulations of legs 

 red or yellowish. Tips of funiculi infuscated. The surface of the 

 body is sometimes more sharply shagreened and therefore somewhat 

 more opaque than in nitidiventris, the hairs even sparser on the head 

 and usually wanting on the thorax. The pubescence is very short 

 and sparser and much as in nitidiventris. 



Female (dealated). Length 7-9 mm. 



Dark reddish brown or blackish; mandibles, scapes, pronotum, 

 petiole, legs, and sometimes also the mesonotum yellowish. Hairs 

 more abundant and longer than in the worker, present also on the 

 thoracic dorsum. Surface of body shining, much as in the female of 

 7iitidive7itris. 



Type locality. — Pennsylvania: Beatty (P. J. Schmitt). 

 North Carolina: Black Mountains (Wm. Beutenm tiller) ; Lake 

 Toxaway (Mrs. A. T. Slosson). 



Georgia: Thunderbolt, Savannah (J. C. Bradley). 

 New Jersey: Halifax (Wheeler). 



