No. 22.] HYMENOPTERA OF CONNECTICUT. 579 



latter state several species which I have had to discard. Mayr 

 ascribed to Connecticut Pogonomyrmex suhdentatus, an ant known 

 to oecur only in the arid deserts of the Southwest ; and Buckley 

 described the following species from the same state: Formica 

 nortonii, F. americana, F. connecticutensis, F. gttava, F. occiden- 

 talism and Myrmica (Diplorhoptrum) scahrata. With the excep- 

 tion of F, gnava, none of these forms can be recognized from 

 Buckley's abominable descriptions. Under F. gnava he evidently 

 included several different ants. One of these, a form of F. fusca 

 intermediate between the varieties subsericea Say and neoru- 

 fibarbis Emery, I have been able to recognize in the Texan fauna, 

 and I have therefore restricted Buckley's name to this particular 

 variety. With this single exception, however, all of the above 

 names of Buckley's Formicidae may be consigned to oblivion. 



As the worker caste is the best known and most commonly 

 met with, it is the only one used for identification in the tables 

 published in the following pages. These tables include the sub- 

 families, genera, and subgenera known to occur in North America 

 north of Mexico. Of the five subfamilies only four are repre- 

 sented in the Northern States, the remaining one (Dorylinae) being 

 confined to tropical and subtropical regions. 



Key to Subfamilies. 



1. Cloaca! orifice ventral, slit-shaped; sting well developed or 



vestigial; abdominal pedicel consisting of one or two seg- 

 ments 3 



Cloacal orifice terminal, circular, surrounded by a fringe of 

 hairs; abdominal pedicel consisting of only a single seg- 

 ment; no constriction between the first and second gastric 

 segments; pupae usually enclosed in cocoon 



CAMPONOTINiE p. 590 



2. Sting developed, sometimes very small but nevertheless ex- 



sertile; abdominal pedicel consisting of one or two seg- 

 ments; when of only one, a distinct constriction between 



first and second gastric segments 3 



Sting vestigial; abdominal pedicel consisting of a single seg- 

 ment; no constriction between first and second gastric 

 segments; anal glands which produce a secretion with a 

 peculiar rancid-butter odor (" Tapinoma odor ") often 

 present; pupae naked Dolichoderin^ p. 589 



3. Pupae always enclosed in cocoons; abdominal pedicel consist- 



ing of a single segment; gaster with a distinct constriction 

 between its first and second segments; frontal carinas 



\ 



