Dec, igio] Wheeler: North American Camponotus, 217 



mens taken at Montpellier, in southern France, whereas the true 

 marginatns of Latreille is a variety of crthiops Fabr. and belongs to 

 the group of maciilatits Fabr. The typical fallax has since been re- 

 peatedly described from France, Austria, Germany, Switzerland, 

 southern Russia and various localities along the Mediterranean 

 littoral. No less than six different forms of the species have been 

 recorded from Asia. Three of these (var. qnadrinotatus Forel, 

 subsp. ritiosiis F. Smith and subsp. bniiiiii Forel) occur in Japan, a 

 variety himalayaniis Forel is recorded from an altitude of 2,160 m. in 

 the Himalayas, another, lamecrei Emery, from Tashkent, in Turke- 

 stan, and an undescribed variety is mentioned by Ern. Andre as 

 occurring in the Amur region of Siberia. A small form, var. ruzskyi, 

 closely resembling the North American var. miniitiis, has been de- 

 scribed by Emery from Sarepta, in southern Russia, Ruzsky has 

 described a var. kamcnsis from eastern Russia and a var. hyalini- 

 pennis Costa is known to occur in Sardinia. Although attention was 

 called to the great variability of the species in North America by 

 Forel as early as 1879 and by Mayr in 1886, Emery was the first to 

 attempt a revision of our forms. In 1893 he enumerated and de- 

 scribed two subspecies and six varieties from the United States. 

 Among the many American specimens of C. fallax which have been 

 accumulating in my collection during the past decade, I have been 

 able to recognize all but two of these forms and have also found 

 four others which are described below. 



The following is a description of the typical European fallax: 



Worker major. — Length 7-9 mm. 



Head nearly as broad as long, subrectangular, a little broader behind than 

 in front, with broadly and feebly excised posterior margin, convex dorsal and 

 concave gular surface. Mandibles convex, 4-5-toothed. Clypeus with lateral 

 borders slightly diverging anteriorly, somewhat convex but scarcely carinate in 

 the middle ; anterior border distinctly notched in the middle, slightly produced 

 on each side as a blunt point. There is a deep dimple in the head near the 

 middle of each lateral clypeal border. Frontal carins lyrate ; frontal area 

 and groove distinct. Eyes rather large, flattened. Antennal scapes slender at 

 the base, gradually enlarged distally, reaching a little beyond the posterior 

 corners of the head. Thorax narrower than the head, broader in front, laterally 

 compressed behind, in profile evenly arched above ; epinotum rounded above, 

 declivity concave below. Petiole nearly as broad as the posterior end of the 

 epinotum, but not as high, its anterior surface convex, its posterior surface 

 flat, margin sharp and, seen from behind, rounded and entire or very faintly 



