306 A^'NAL8 NEW YORK ACADEMY OF SCIENCES 



gaster, the lower pleurae, the petiole, legs and funiculi dark bro\\Ti. The 

 clypeus, mandibles and scapes are black. 



8. C. maculatus maccooki Forel 



C. sijlvaticus stirps maccooki Forel, Bull. Sec. Vaud. Sci. Nat., (2) XVI, P. 

 81, p. 69, t^ 9 5, 1879; Ibid., (2) XX, P. 91, p. 347, 1884. 



C. maccooki Dalla Tobre, Catalog. Hymen., VII, p. 241, 1893. 



C. maculatus subsp. tnaccooki Emery, Zool. Jahrb. Abth. f. Syst, VII, p. 672, 

 Taf. XXII, Fig. 29, ^ , 1893. 



Worker major. Length, 10-13 mm. ; bead, 3.2 x 3 mm. ; scape, 2.7 mm. ; 

 hind tibia, 3.6 mm. 



In structure closely resembling C. vicinus, but the antennal scapes are more 

 thickened at their tips, and their bases are not only flattened but dilated to 

 form a small but distinct, rounded lobe ou the outer side. Mandibles 5- to 6- 

 toothed. Base and declivity of epinotum subequal. Middle and hind tibiae 

 elliptical in cross-section, not sulcate. 



Sculpture of body as in the var. nitidlventris, the sides of the head covered 

 with punctures or small foveolie as in that form. 



Pilosity as in vicinus, but pubescence much less developed, being as short 

 and inconspicuous as in 7iitidiventris. There are no hairs on the cheeks. 

 Middle and hind tibire with bristly flexor surfaces. 



Head, cheeks, clypeus, mandibles and antennte deep reddish brown or ferru- 

 ginous; front and vertex black, mouthparts yellowish. Thorax, legs, petiole 

 and gaster sordid light brown or brownish yellow, the gaster usually more or 

 less dark brown at the tip and often transversely banded with fuscous on the 

 more anterior segments, rarely black throughout. 



Wo7-kcr minor. Length, 6-8 mm. 



Resembling the worker major in sculpture, pilosity and color, but the head 

 is more shining. The lobular dilation at the base of the antennal scape is 

 small but perceptible. 



Female. Length, 12-14 mm. 



Resembling the female of nitidivcntris in sculpture and pilosity; color like 

 that of the major worker, but the mesonotum, scutellum and metanotum are 

 dark bi'own, the pronotum more or less infuscated. In some specimens the 

 whole gaster is brownish yellow and lighter than the pleurae and legs; in 

 others it is dark brown at the tip and obscurely transversely banded with 

 brown more anteriorly. Wings suffused with brownish yellow ; veins yellow, 

 stigma brownish. 



Male. Length, 9 mm. 



Very similar to the male of vicinus and its varieties. The antennal scapes 

 are flattened, dilated and lobulate at the base. 



The types of this subspecies came from the Island of Guadalupe, about 

 200 miles off the west coast of Lower California. I have seen numerous 



