272 Bulletin American Museum of Natural History. [Vol. XXIIl, 



of denticles. (PI. XI, Fig. 8.) As in the genus Dorylus the clypeus is 

 also more convex and projecting in the smaller than in the larger workers. 



Myrmicin^. 



9. Pseudomyrma belti Emery var. fulvescens Eviery. — Many workers 

 of the typical form of this variety. 



10. Pseudomyrma dolichopsis Forel. — Several workers which agree 

 perfectly with Forel's description except in size. They are only 3-3.3 mm. 

 in length and may belong to an incipient colony. 



11. Pseudomyrma sericea Mayr. — A single worker. 



12. Pseudomyrma caroli Forel. — Numerous workers agreeing very 

 closely with Forel's description of specimens from Costa Rica and with a 

 type specimen of the var. clapii Forel from the Amazon. 



13. Pseudomyrma delicatula Forel. — Four workers. 



14. Monomorium carbonarium ebeninum Forel. — Many workers of the 

 typical form of this subspecies. 



15. Monomorium floricola Jerdon. — Numerous workers. 



16. Solenopsis geminata rufa Fahr. — Many workers of the typical 

 East Indian form of this common tropicopolitan ant. They are of a reddish 

 yellow color, with a well developed spine on the mesosternum. The largest 

 specimens measure only 3.5-4 mm. 



17. Pheidole anastasii Emery var. johnsoni var. nov. — Numerous 

 soldiers, workers and males taken from a single colony (Feb. 2). The 

 soldiers and workers resemble the corresponding phases of anastasii ex- 

 cept in having the whole head, thorax and pedicel opaque as in puncta- 

 tissima Mayr. The color is that of anastasii. 



18. Pheidole megacephala Fabr. — Several soldiers and workers of the 

 typical form. 



19. Cremastogaster brevispinosa Mayr. — Many workers from several 

 colonies marked "small black house-ant." Among these are a number of 

 pseudogynic individuals not exceeding the largest workers in size (2.3 mm.), 

 with an enlarged mesonotum and sometimes with a small scutellum and 

 minute nodular or strap-shaped vestiges of fore wings. These abnormal 

 individuals are of exactly the same character as the pseudogynic specimens 

 of Myrmica which I have described and figured in a former paper.^ 



20. Cryptocerus cristatus Emery. — A worker and two females. The 

 wings of the latter are smoky brown, with heavy dark brown veins and 

 stigma. 



iThe Polymorphism of Ants, with an Account of Some Singular Abnormalities due to 

 Parasitism. Bull. Am. Mus. Nat. Hist., Vol. XXIII, 1907, p. 43, pi. iv, figs. 45-49. 



