1 66 PSYCHE [August 



Stenamma nearcticum Mayr. 



S. nearcticum Mayr, Verh. zool.-bot. gesell. Wien, i8S6 p. 447. $ 9 (nee $ ). 



? S. 7veshiioo(H West, subsp. nearcticum Emery, Zool. jahrb. Abth. f. syst. bd. 8„ 



1894, p. 299, 300. 5 . 



S. nearcticum Forel, Ann. Soc. ent. Belg., torn. 45, 1901, p. 347. ^ 9 . 



Stenamma brevicorne Mayr. 



Aphaenogaster brevicornis Mayr, Verh. zool.-bot:. gesell. Wien, 18S6, p. 447. ? ?? . 



Stenatnma nearcticum Mayr, ibid. p. 454 ^ (nee $ et ? ). 



S. brevicorne Emery, Zool. Jahrb. Abth. f. Syst. Bd. 8, 1894, p. 298. J" 9 $ . 



.S. ivestivoodi %v\\i'a^. diecki Emery and var. impressum Emery, ibid. p. 300, 301. 



S. brevicorne Forel subsp. diecki, var. impressum, and subsp. impar Forel, Ann. Soc. 



ent. Belg.,t. 45, 1901, p. 347. 348- 



I subjoin a table for the identifieation of the worker forms of S. brevicorne, so 

 far as I am able to separate them. The eonstruction of this table has been 

 faeilitated by the kindness of Professor Emery, who contributed to my collection 

 types of diecki and a specimen of what he took to be the worker of nearcticum, 

 both from Yale, British Columbia, and Professor Forel who generously sent me a 

 type of impar. 



SrENAMMA BREVICORNE Mayr. 



I. Head, thorax and pedicel opaque ; the spaces between the rugae not suffi- 

 ciently smooth to make the occiput and pronotum appear shining under a low 

 magnification. 



A. Larger forms (2.5-4 mm.). Body dark brown or nearly black, except 

 the base and tip of the gaster which are yellow or reddish. Milwaukee 

 (C. E. Brown) ; Rockford, Illinois (Wheeler) ; Beatty, Pennsylvania (Rev. P. 

 J. Schmitt), Angora, Pa. (Schmitt) ; Friday Harbor, Washington, (Kincaid) ; 

 Lyndon, Vermont (A. L. Melander) ; Virginia; Pennsylvania (Pergande) 



brevicorne (typical). 



B. Smaller forms (2.4-3 '^i"!-)- Body brown or red; with a blackish band 

 across the first gastric segment. 



I. Sculpture finer than that of the typical brevicorne. Length 2.4-2.7 

 mm. Eye with at least six ommatidia in its greatest diameter. Epinotal 

 spines well developed. Petiolar node more compressed anteroposteriorly ■ 



