354 ANNALS NEW YORE ACADEMY OF SCIENCES 



58. Camponotus maculatus dumetorum supsp. nov. 



Wo7'ker major. Length, 10-13 mm. ; bead, 3.3 x 3 mm. ; scape, 2.5 mm. ; bind 

 tibia, 3 mm. 



Combining characters of maccooki and the typical vicinus. Antennal scape 

 not only flattened at the base but dilated to form a lobule which is even larger 

 than that of maccooki and often obtusely angular. Body coarsely shagreened ; 

 head and thorax subopaque, gaster slightly shining. Clypeus with several 

 large, elongate, piligerous foveolse; cheeks with more numerous and smaller, 

 elongate foveolie; remainder of head feebly punctate; frontal region with a 

 few deep, piligerous punctures. Hairs and pubescence as in the typical vicinus, 

 yellow, the former absent on the cheeks, erect and abundant on the dorsal and 

 gular surfaces of the bead, thoracic dorsum, petiolar border, gaster and flexor 

 surfaces of the femora Pubescence long but sparse, conspicuous on the head, 

 pleurae, legs and gaster. Head, mandibles, scapes and gaster black; funiculi, 

 legs, thorax, petiole and extreme base of first gastric segment dull brown. 



Workei' minor. Length, 6-9 mm. 



Resembling the worker major, but with the usual differences in the shape 

 of the head, which is often more or less bi-own like the thorax, especially in 

 front. The lobule at the base of the antennal scape is very large and con- 

 spicuous and more angular, so that the scape at this point may be broader 

 than at the tip. 



Male. Length, 10-11 mm. 



Resembling the male of vicinus, but the head is proportionally shorter and 

 broader, the cheeks are more convex and the scapes are flattened and lobulate 

 at the base. The whole head, especially its sides and gular surface, is con- 

 spicuously hairy. Pleurae, gaster and legs also with numerous, but less con- 

 spicuous, erect, tawny yellow hairs. Head and thorax opaque, gaster and legs 

 more shining, but the whole surface densely shagreened. Body black ; funiculi 

 and tarsi brown ; wings suffused with yellow, with yellow veins and stigma. 



Described from numerous specimens taken from many colonies in the 

 dry foot-hills of the San Gabriel Eange near Pasadena and Claremont, 

 California, up to an altitude of 2,000 feet. 



This ant appears to be the dominant insect of the chaparral. It nests 

 in the ground among the bushes, forming fiat craters varying from a few 

 inches to a foot in diameter, with a round or, more frequently, elongate 

 entrance. It does not go abroad in the day time, at least during the dry 

 season. The number of its nests in the chaparral is surprising, but it is 

 difficult to study these, except in places where the brush has been burned 

 over or where it has been cleared away to leave fire guards. The workers 

 probably derive their sustenance from the aphids and coccids on the scrub- 

 oaks {Quercus dumosa) and other bushes that compose the chaparral. 



