874 CALIFORNIA ACADEMY OF SCIENCES. 



Subfamily Dorylini. 



19. EciTON (AcAMATUs) scHMiTTi Emery. 



Eciton Schmitti Emery, Bull. Soc. Entom. Ital., v, 26, 1894, p. 183. 

 Eciton Schmitti Emery, Zool. Jahrb., viii, 1894, p. 258. 



Many specimens. Tepic. 



20. EciTON (AcAMATUs) MELANOCEPHALUM Emery. 



Eciton melanocephalum Emery, Zool. Jahrb., viii, 1894, p. 260. 

 Eight specimens. Tepic. 



21. Eciton (Acamatus) californicum Mayr subsp. 

 OPACITHORAX Emery var. 



Eciton californicum Mayr, subsp. opacithorax Emery, Zool. Jahrb., 

 viii, 1894, p. 260. 



Numerous specimens. San Jose del Cabo. 

 It differs from the typical form in the slightly coarser 

 sculpturing of the thorax. 



22. Eciton nitens Mayr. 



Eciton nitens Mayr, Aniiii. Soc. natural., Modena, iii, 1868, p. 168. 

 Eciton nitens Mayv, Sitzb. Akad. Wiss., Wien, Ixi, 1870, p. 398. 



Two specimens. San Lazaro, Lower California, 

 These specimens, notwithstanding their rather small 

 size, measuring only 2.4 mm. in length, agree apparently 

 in every essential point with the description of the above 

 species. I deem it therefore advisable, until a larger se- 

 ries has been obtained, to regard them as but a small 

 form of that species. 



Subfamily Myrmicini. 



23. PsEUDOMYRMA GRACILIS (Fab.) Mayr. 



Formica gracilis Fabricius, Syst. Piez., 1804, p. 405. 



Leptalea gracilis Erichson, Arch. f. Naturg., v, P. 2, 1839, p. 309. 



Pseudoinyrma hicolor Giierin, Icon. regn. auim., vii. Insect., 1845, 



p. 427. 

 Pseuclo'inyrma hicolor Smith, Trans. Eut. Soc, London (2) iii, 4, 



1855, p. 157. 

 Formica gracilis Roger, Berlin, entom. Zeitsch., vi, 1862, p. 289. 



