50 Psyche [April 



A NEW SUBSPECIES OF APHAENOGASTER 

 TREAT M FOREL. 



By William Morton Wheeler. 



Aphaenogaster treatae subsp. harnedi subsp. no v. 



Worker. Differing from the typical treatoe in having the lobe at 

 the base of the antennal scape much shorter and narrower, not 

 more than \ as long as the scape (about i as long in the type), and 

 in sculpture, the thorax, petiole, postpetiole and basal half of the 

 first gastric segment being opaque and densely punctate and the 

 puncturation of the head denser and coarser, so that its occiput 

 and sides are opaque. The petiolar node is less compressed antero- 

 posteriorly, with shorter peduncle, and the postpetiole is more 

 evenly rounded above in profile. The color is like that of the 

 typical treatoe, but the head is not infuscated above. 



Described from ten specimens taken by Prof. R. W. Harned at 

 Caesar, Mississippi. Seven specimens taken by myself at Denton 

 and Montopolis, Texas and an equal number taken by Father J. 

 Schmitt at Donophan, Missouri, are also referable to this sub- 

 species though they have the lobe of the antennal scapes as long 

 and broad as in the typical treatoe, which ranges from South Caro- 

 lina to Long Island. The var. ashmeadi Emery from Georgia and 

 Florida and the subsp. wheeleri Mann from Naushon Island, Mass., 

 are darker and the former has very short antennal lobes, a trans- 

 versely rugose epmotum and opaque, coarsely rugose mandibles, 

 the latter long antennal lobes, coarse, rugulose cephalic and 

 thoracic sculpture and horizontal epinotal spines. Both of these 

 forms have the first gastric segment smooth and shining as in the 

 typical treatoe or punctate only at the extreme base. The females 

 of treatoe and of the subsp. wheeleri, however, have the basal half 

 of the first gastric segment opaque and punctate as in the worker 

 harnedi. 



