No. 22.] HYMENOPTERA OF CONNECTICUT. 595 



2. Color deep red, gaster black 3 



Color light red, gaster brown 



sanguinea subspecies subintegra 



3. Head and thorax not infuscated; slaves nearly always present 



in formicaries sanguinea subspecies rubicunda 



Head and thorax often infuscated above; slaves few or entirely 

 absent sanguinea subspecies aserva 



4. Posterior border of head broadly excised exsectoides 



Posterior border of head not excised 5 



5. Body rather stout; head of larger workers usually but little 



longer than broad; second to third funicular joints, much 

 more elongated than sixth to eighth; color red, with brown 



or black gaster 6 



Body more slender and graceful; head of larger workers dis- 

 tinctly longer than broad; second to third funicular joints 

 but little more elongated than sixth to eighth; color rarely 

 as in preceding 9 



6. Petiole broad, with sharp upper border 7 



Petiole narrow, thick and blunt above difficilis var. consociems 



7. Gula, or lower surface of head, with erect hairs 8 



Gula and" body without erect hairs . .truncicola subspecies Integra 



8. Tibiae with suberect hairs ; females large 



truncicola subspecies obscuriventris 

 Tibiae without suberect hairs; females very small nepticula 



9. Middle funicular joints more than one and one-half times as 



long as broad; scape very slender and nearly straight; 

 petiole with convex anterior and posterior surfaces and 

 blunt upper margin; body smooth and rather shining 



(pallide-fulva) 10 



Middle funicular joints usually less than one and one-half 

 times as long as broad; scape distinctly curved at base; 

 posterior surface of petiole flat, body more densely pubes- 

 cent (fusca) 13 



10. Gula and petiolar border with erect hairs 11 



Gula and petiolar border without erect hairs 12 



11. Yellowish or reddish brown, gaster but little darker, gula 



and petiolar hairs numerous 



pallide-fulva subspecies schaufussi 

 Somewhat smaller and darker, with only a few erect hairs on 

 gula and petiolar border pallide-fulva schaufussi var. incerta 



12. Head and thorax deep reddish; gaster brownish black, 



shining % pallide-fulva subspecies nitidiventris 



Head and thorax as well as gaster dark brown or piceous, sur- 

 face more opaque pallide-fulva nitidiventris var. fuscata 



13. Gula without erect hairs 14 



Gula with erect hairs 15 



