86o CALIFORNIA ACADEMY OF SCIENCES. 



Numerous specimens. Tepic, Mexico. 



A cosmopolitan species; common in the tropical re- 

 gions of Asia, Africa, Australia and America, and in 

 many of the hothouses of Europe and this country. 



3. Prenolepis anthracina Rog. var. nodifera 

 Mayr. 



Prenolepis nodifera Mayr, Sitzber. Acad. Wien, Ixi, 1870, p. 388. 

 Prenolepis nodifera Mayr, Verb. zool. bot. Ges., xx, 1870, p. 948. 

 Prenolepis nodifera Forel, Mittbeil. Muucb. ent. Ver., v, 7, 1881- 



p. 2. 

 Prenolepis nodifera Forel, Bull. soc. Vaud. sc. iiat. (2) xx, P. 91, 



1884, p. 348. 



Worker: Length, 2.4-2.8 mm. Head about twice as 

 long as broad, the sides parallel and nearly straight, 

 rounded behind the eyes, the occiput slightly emarginate. 

 Clypeus of the usual form, rather strongly convex and 

 carinated along the middle. Mandibles furnished with 

 six acute teeth. Antenna rather stout, the scape about 

 one -fourth longer than the head. Thorax of the usual 

 shape in this genus, the meso-metanotal constriction deep; 

 the metanotum convex, elevated, nodiform, with an acute 

 angle each side at base of the declivity. Scale narrow, 

 w^edge- shaped, somewhat broadest and slightly rounded 

 at the apex. Abdomen of the usual shape. Legs rather 

 stout. 



Erect hairs blackish, rather coarse and quite dense, 

 though less dense on the scape and legs. Appressed 

 pubescence whitish, most dense on the legs and antennee. 



Color black, polished, the thorax and scale sometimes 

 dark brown. Mandibles, base of scape, trochanters, tarsi 

 and sometimes the apex of femora and tibiae yellowish 

 or brownish -3'-ellow; posterior margin of abdominal seg- 

 ments, if extended, whitish. 



Female: The characters of the female, which I judge 

 as belonging to this species, are as follows: 



