556 bulletin: museum of comparative zoology. 



Worker. Length 4-6 mm. 



Differing from the preceding forms of schaiifussi in its smaller 

 average size, pilosity, pubescence, and usually also in coloration. 

 The hairs, though present on the upper surface of the head and thorax 

 and on the gaster, are lacking on the gula and petiole. The pubes- 

 cence is extremely short and sparse, so that the gaster is much more 

 shining. The head, thorax, petiole, and appendages are often red 

 or brown and much darker than in schaiifussi and the gaster is dark 

 brown. Often also the back of the head is darker than the thorax. 



Female. Length 6.5-8 mm. 



Smaller than the female of the preceding forms and more deeply 

 colored. The head, thorax, antennae, and legs are yellowish or red- 

 dish brown, with the upper surface of the head, posterior border of 

 pronotum, three large spots on the mesonotum, disk of scutellum, 

 meso- and metapleurae, and gaster dark brown. Whole surface of 

 body very smooth and shining. Pilosity similar to that of the worker, 

 but longer on the gaster. Pubescence also somewhat longer but not 

 obscuring the shining surface. Wings grayish hyaline, with brown 

 veins and stigma. 



Male. Length 7-9 mm. 



Differing from the male of the preceding forms in coloration. The 

 head is black; the mandibles, scapes, thorax, and petiole brownish 

 yellow; the funiculi and gaster dark brown, the genitalia yellow and 

 more or less infuscated. The pleurae, scutellum, and epinotum are 

 spotted with fuscous and there are three large, elongated fuscous 

 spots on the mesonotum. Antennal scapes and tarsi sometimes brown. 

 In some specimens the whole mesonotum is fuscous and in others the 

 lighter portions of the thorax are brown instead of yellow. In still 

 other specimens the whole thorax is dark brown with yellowish sutures. 

 Wings as in the female. 



Type locality. — District of Columbia (Th. Pergande). 



Virginia: (Th. Pergande). 



North Carolina: Black Mountains (Wm. BeutenmuUer). 



New Jersey: Halifax (Wheeler). 



New York: Mosholu (Wheeler). 



Pennsylvania: Beatty (P. J. Schmitt). 



Connecticut: Colebrook (Wheeler); New Haven (Butrick); Salis- 

 bury, New Haven, Orange (W. E. Britton). 



Massachusetts: Wellesley (A. P. Morse); Essex County (G. B. 

 King); Forest Hills, Blue Hills, Woods Hole (Wheeler); Arlington 

 (Mus. Comp. Zool). 



Indiana: Hammond, Kosciusko County, Marion County (W. S. 

 Blatchley). 



