MEXICAN FORMICID^. 875 



Pseudomyrma hicolor Norton, Am. Natiir., ii, 1868, p. 65. 

 Pseudomyrma gracilis Mayr, Sitzber. Akad. Wiss., Wien, Ixi, 1870, 



p. 407. 

 Pseudomyrma hicolor Rothnej^ Trans. Ent. Soc, London, 1889, p. 



352. 

 Pseudomyrma gracilis Emery, Bull. Soc. Ent. Ital., xsii, 1890, p. 59. 



Ten workers. Tepic. 



This is an extremely variable species. In some of its 

 forms the entire head, the thorax, both nodes, anterior 

 and median legs, are reddish-yellow, the antennse brown 

 or blackish and the posterior legs and abdomen black. 

 In another form, only the thorax, with the exception of a 

 round spot on the mesonotum, more or less of the anterior 

 and median legs and the first node are reddish, the rest 

 black. A third form is black, with the anterior margin of 

 the head, mandibles, base and apex of the scape, protho- 

 rex, margin of the mesonotum, apical third of anterior 

 femora, the tibia; and tarsi, petiole and apex of first node 

 and base of abdomen reddish -yellow, while in a fourth 

 form the anterior margin of the head, the mandibles, the 

 pro- and metathorax, the anterior femora, except at base, 

 and the anterior tibia; and tarsi are only reddish -yellow 

 and all the rest black. 



24. Pseudomyrma pallida Smith. 



PseudomyrTna jjallida Smith, Trans. Ent. Soc, London (2) iii, 4, 



1855, p. 159. 

 Pseudomyrma pallida Smith, Cat. Hym. Ins. Brit. Mus., vi, 1858, 



p. 155. 



Ten specimens. Tepic. 



25. MoNOMORiUM MiNUTUM Mayr, race ebeninum 

 Forel. 



Monomorium minutum Mayr, race ebeninum Forel, Hist. Phys. Nat. 

 Polit., Madagascar, Formicides, xx, 1891, p. 165. 



Numerous specimens. Santiago IxtquintJa, Tepic. 

 Very similar in appearance to Monomoriuni race car- 



