found in Southern India. 51 



9. Ocodmna diffusa, Jerdou (p. 109). 



Worker about ^th of an inch long; head somewhat oval, 

 nearly smooth, with a few scattered granules, slightly emargi- 

 nate behind ; eyes moderate size ; thorax deeply grooved, with 

 two small spines posteriorly ; first abdominal pedicle very pointed, 

 conic, second rounded, of equal height ; head, thorax and legs 

 rufous ; abdomen brown. 



Warrior ith of an inch long ; jaw strongly toothed j head 

 large, much striated, deeply notched behind j thorax more deeply 

 grooved and tubercle d; otherwise as in the worker. This spe- 

 cies appears to be spread over most of India, and has similar 

 habits to the last. 



10. Ocodoma diversa, Jerdon (p. 109). 



Worker about /^ths of an inch long; head oblong, nearly 

 smooth, emarginate behind; eyes small; jaws triangular, toothed ; 

 thorax but slightly grooved and with two longish spines poste- 

 riorly ; first abdominal pedicle broadly conic, second rounded ; 

 head, thorax and legs dark maroon ; abdomen blackish. 



Warrior nearly A an inch long; head very large, nearly 

 smooth, slightly striated ; jaws lancet-shaped, entire ; eyes small, 

 somewhat advanced ; antennae short ; otherwise as in the worker. 



I procured this ant in the Wynaad, where it is not uncom- 

 mon. The diflxjrence between the worker and the warrior is 

 greater than in any other Indian species. 



11. Ocodoma affinis, Jerdon (p. 110). 



Worker ^th of an inch long; head nearly square, almost 

 smooth, with only a few stria? ; eyes nearly medial, smaUish ; 

 jaws triangular, with two strong teeth at the external angle of 

 the jaw, and two smaller at the internal angle; thorax very 

 slightly grooved, with two curved spines posteriorly ; first abdo- 

 minal pedicle very narrow, long, conic posteriorly, not much 

 raised ; second rounded, of equal height, broader ; head, legs 

 and thorax rufous ; abdomen dusky. 



Warrior nearly j^ths of an inch long ; head and jaws striated ; 

 eyes very minute; head notched anteriorly; antennse inserted 

 in a deep groove ; metathorax elevated ; no palpi apparently. 



This ant is very common in Malabar ; is nearly allied to, but 

 difiers from, O. diversa in the toothed jaws of the warrior, &c. 



12. Ocodoma minor, Jerdon (p. 110). 



Worker about :j%ths of an inch long, entirely rufous ; head ob- 

 long, smooth; eyes small; jaws long, somewhat triangular, toothed, 

 last tooth prolonged ; thorax slightly grooved, with two small 



4* 



