534 bulletin: museum of comparative zoology. 



mesonotum and scutellum which are shining and very sparsely punc- 

 tate. Gaster shining, very dehcately shagreened and with minute, 

 scattered piligerous punctures. 



Pilosity and pubescence as in the worker. 



Color variable. Most individuals have the head, thorax, petiole, 

 and gaster black, the mandibles, legs, and antennae, except the tips of 

 the funiculi, deep red. Others have the venter and base of the first 

 gastric segment and the border of the petiole light red, and still others 

 have the whole gaster and the petiole, except its extreme base, red. 

 Wings grayish hyaline, with brown veins and stigma. 



Male. Length 8-9 mm. 



Mandibles edentate or indistinctly bidentate. Head small, broader 

 than long, the posterior border broadly convex, the eyes large. Thorax 

 and gaster robust, the latter flattened. Petiole rather high, somewhat 

 compressed anteroposteriorly, transverse, its border rather sharp, 

 seen from behind straight or feebly excised in the middle, rounded on 

 the sides. Genitalia robust, tips of stipes not extending very far 

 beyond the tips of the other appendages. 



Somewhat shining; head and thorax a little more opaque, densely 

 punctate. Frontal area rather smooth and shining in some specimens, 

 in others subopaque. 



Hairs and pubescence yellow, the former sparse, erect, distributed 

 much as in the worker, but absent on the upper surface of the gaster. 

 Eyes hairless. Pubescence dense but short and not completely con- 

 cealing the surface. 



Black; gaster and legs bright yellowish red; tips of mandibles 

 reddish. Wings as in the female. 



Type locality. — California: San Francisco. 



California: Pacific Grove (H. Heath, W. M. Mann, Wheeler); 

 Mount Lowe, summit 6,400 (W. Quayle, Wheeler) ; Palo Alto, Corte 

 Madera Creek (W^ M. Mann); Felton, Santa Cruz Mountains (J. 

 C. Bradley); King's River Canyon (H. Heath); Baldy Peak, San 

 Gabriel Mts. (Brewster, Joos, Crawford); Sierra Nevada, Marine 

 County; Goat Island, San Gregorio. 



Washington: Orcus Island (W. M. Mann). 



Oregon: Corvallis (T. Kincaid). 



British Columbia: Vancouver. 



This is not a form of F. fusca as Mayr, Emery, and I have been sup- 

 posing, but a very distinct species peculiar to the Pacific Coast. Its 

 citation from the Eastern States and its allocation with fusca and 

 neogagates has resulted from a study of the medium and small workers 

 only and a failure to recognize the characters of the largest workers 

 which represent a caste as distinct as the worker major of many 



