wheeler: ants of the genus formica. 501 



mesonotum, the whole of the scutellum and metanotum, a few spots 

 on the mesopleurae and the middle and hind legs, including their 

 coxae, black. 



Described from two females and seven workers collected by Mr. 

 W. M. Mann at Elkhorn, Montana. He has also taken six workers 

 at Helena in the same state. The two females are immature so that 

 the red of the head and thorax is paler and more yellowish than in the 

 workers. The opacity of the body and the character of the pubescence 

 on the gaster in both female and worker show clearly that this variety 

 is to be referred to the subspecies integroides Emery and not to Integra 

 Nylander. 



141. F. subpolita var. ficticia, var. nov. 



Worker. Length 3-6 mm. 



Very closely resembling the typical form from California but differ- 

 ing in having the head less deeply and less extensively infuscated 

 behind, the thorax bright red and rarely infuscated even in the small 

 workers, the erect hairs, especially on the pronotum and gula, less 

 numerous, the petiolar border sharper and more compressed, and the 

 antennal scapes a little less enlarged towards their tips. 



Female. Length 8.5 mm. 



Differing from the female of the typical form in having the clypeus, 

 cheeks, and pleurae red, the mesonotum less shining and the wings 

 somewhat shorter and more nearly colorless. 



Male. Length 7.5-8 mm. 



Differing from the male of the typical form in color, the gaster being 

 black, instead of reddish yellow, with the genital appendages more or 

 less infuscated or black. The stipes of the genitalia are broad and 

 blunt, the subgenital plate broad, the gaster compressed dorsoventrally 

 The head is shaped as in the typical form, the wings paler. 



Described from one female, five males, and twelve workers taken 

 by Mr. W. M. Mann at Helena, Montana. He has also given me eight 

 workers from Elkhorn in the same state. It is interesting to find this 

 form so far inland from the Pacific Coast. The discovery of the male 

 is somewhat disconcerting, since it would seem to indicate that after all 

 F. rufiventris Emery may not be, as I have stated, the male of the typi- 

 cal subpolita Mayr, but the male ficticia agrees so closely with the 

 form described by Emery, except in the color of the gaster, that I am 

 not ready to admit myself mistaken, especially as the females of the 

 typical subpolita vary from black to yellowish red in the color of the 

 gaster. 



