DESCRIPTION OF MEXICAN ANTS. 3 



with delicate punctures. (Antennae wanting.) Head 

 subquadrate, hardly emargiuate and truncate behind, 

 corners distant. Eyes subovate, small. Face not rugose ; 

 a distinct ridge down the nasus, continuing an impressed 

 line above. The whole face below the antennae rufous. 

 Thorax compressed behind ; node rounded, not thickened, 

 flattened behind. Abdomen dull black, covered with a 

 silky pile, visible in certain lights. Head and body with 

 a few scattered long hairs. Legs piceous black, the 

 anterior larger than the others. (Two workers.) 

 This is somewhat like the F. corusca of Smith. 



Camponotus (Tapinoma) piceatus Norton (nov. sp.). 

 Worher major. Length, 0.20 in. Color entirely red- 

 dish piceous. Antennae pale. A carina on the nasus, 

 an impressed line above. Head one half wider than tho- 

 rax, square, not hollowed behind, and, with the thorax, 

 dull with delicate punctures. Thorax compressed behind, 

 declivity abrupt, incisures distinct. Node rounded, con- 

 vex behind, so as to fit closely into the concavity of abdo- 

 men. Abdomen shining, not polished, base of segments 

 darker, apex narrowly margined with pale gold. Body 

 covered with sparse whitish hair. Legs shorter than in 

 those of the previous genus. (Five workers.) 



Camponotus (T.) tomentosus Norton (nov. sp.). 



Worlier major. Length, 0.28 in. Dull blackish, with 

 ferruginous tints ; the abdomen sericeous, with a greenish 

 pile. Head quadrate, large, nearly 

 twice as wide as abdomen, dull, with 

 dense fine punctures ; eyes small, 

 subovate ; antennas black, inserted 

 beneath the raised inner carina which 

 partly overlaps the radicle ; nasus 

 hardly carinate ; mandibles wide,, 

 with about three iuner teeth, outer 

 tooth sharp. Thorax narrowed be- 

 hind, faintly ferrughious. Node 

 rounded, slightly convex behind, rather large. Abdomen 

 black, the apical margins of segments narrowly polished, 

 golden, the node and abdomen closely covered with shin- 



