894 CALIFORNIA ACADEMY OF SCIENCES. 



riorly, fine and longitudinal. Nodes faintly shagreened. 

 Abdomen smooth, the first segment with a few narrow and 

 elongated depressions. Erect hairs yellowish, short and 

 stiff, most dense on the abdomen, those of the antenna 

 and legs shorter and finer. 



Polished, brown, the mandibles and tarsi reddish -yel- 

 low. 



Two specimens. Tepic. 



This species appears to be related to Ischnomyrmex 

 (Myrniica) longtpes Smith, the description of which is, 

 however, so obscure as to leave considerable doubt about 

 it. 



42. PoGONOMYRMEx BARBATus (Smith) Mayr. 



Myrmica barbaia Smith, Cat. Hym. Ins. Brit. Mus., vi, 1858, p. 130. 

 For additions] references, see Dalla Torre, Cat. Hym. vol. vii, For- 

 micidee, 1893, p. 118. 



Twenty- three specimens. Miraflores and Sierra San 



Lazaro, Cape Region, Lower California. 



43. PoGONOMYRMEX CALiFORNicus (Bucklcy) Emery . 



Myrmica californica Buckley, Proc. Eut. Soc, Philad., 1867, p. 336. 

 Pogonomyrmex badius Mayr, Verb. zool. bot. Ges., Wieu, xx, 1870, 



p. 971; xxxvi, 1886, p. 450; xxxvii, 1887, p. 610. 

 Pogonomyrmex badius Pergande, Proc. Cal. Acad. Sci. (2), iv, 1893, 



p. 33. 

 Pogonomyrmex californicus Emery, Zool. Jahrb., viii, 1894, p. 311. 



Numerous specimens. San Jose del Cabo. 



A somewhat larger, more robust and more strongly 

 sculptured variety of this species, has also been found by 

 Dr. Gustav Eisen at Tucson, Arizona. 



44. XiPHOMYRMEX SPINOSUM n. Sp. 



Worker: Length, 3.2—3.4 mm. Head, thorax and 

 nodes coarsely and longitudinally rugose, those of the 

 head somewhat finer and the spaces between them dis- 

 tinctly reticulated, the clypeus quite coarsely striated; 



