iDec, 1910.] Wheeler : North American Camponotus. 227 



tibia-, which are black. Wings colorless, with dilute yellow veins and stigma. 

 The head, thorax and petiole have a few long, erect hairs and those on the 

 gaster are rather abundant. 



Described from a number of specimens of all four phases belong- 

 ing to a single colony captured by Mr. Maurice Tanquary in an old 

 stump near Urbana, 111. In coloration, though not in size, this vari- 

 able form seems to represent a transition between uii)iittiis and 

 ■dccipiciis. 



5. C. fallax fallax var. decipiens Emery. 



C. niarginatus var. dccipiciis Emery (in part), Zool. Jahrb. Abth. f. Syst., 

 VJI, 1893, P- 6-6, $$. 



Worker major. — Length 5.5-7 mm. 



Head, thorax, petiole and appendages brownish-red ; gaster black, with 

 pale yellow margins to the segments. In some specimens the middle of the 

 head and anterior border of the cheeks are dark brown. Sculpture and 

 pilosity as in the preceding varieties. 



Worker minor. — Length 4.5-5 mm. 



Resembling the worker major in color but the posterior portion of the 

 head is often deep red or brown and the petiole is more or less infuscated. 



Female. — Length 8-9 mm. 



Resembling the worker major. Scutellum, a large anteromedian and two 

 ■elongate parapsidal blotches on the mesonotum, black or dark brown. Head 

 sometimes infuscated in the middle behind. Wings yellowish, with yellow 

 -veins and stigma. 



Male. — Length 6 mm. 



Indistinguishable from the male of nearcticits. 



I have seen specimens of this variety from the following localities : 



Indiana: Cotype worker minor (Emery). 



Kansas: Douglas, in bee-hive with bee-moths (E. S. Tucker and 

 Miss Clara Klaumann). 



Colorado: Colorado Springs, running on trunk of cotton-wood 

 .(Wheeler). 



Utah: Mill Creek (R. V. Chamberlin). 



Emery also includes Texas among the localities, but the specimens 

 which he cites from this state really belong to a distinct and larger 

 though very similar form, which is described below as subsp. rasilis. 

 The type locality of dccipiciis is therefore Indiana. The specimens 

 from Mill Creek, Utah form a transition to rasilis, because the females 

 and workers are decidedly larger than those of the typical dccipiciis. 



6. C. fallax rasilis, new subspecies. 



C. margiiiatiis var. decipiens Emery (in part), Zool. Jahrb. x\bth. f. Syst., 

 VII, 1893. P- 676, $$. 



