— 238 — 



19. -Wasmannia anropunctata Roger var. rugosa Forel 



Several workers and a deälated female from Caernavaca in 

 Morelos, a locality in which I also took this variety several ye- 

 ars ago. 



Subfamily Camponotinae. 

 20. — Rhizomyrma exsanguis sp. no v. 



Worker. Length 1.4 — 1.6 mm. 



Resembling the other species of the genus, Bh. pachycera 

 Emery, decedem Mayr, goeidii Forel and smith? Forel, but de- 

 cidedly smaller. Mandibles long, slender, uniformly curved, with 

 parallel borders and three acute, oblique teeth. There is absolute- 

 ly no indication of a basal as distinguished from an apical man- 

 dibular border, as there is in all of these species. Antennae 8-9- 

 jointed; scapes reaching almost to the posterior corners of the 

 head; all the funicular joints, except the first and second, much 

 broader than long. Eyes extremely minute. Thorax, petiole, ga- 

 ster and legs as in goeidii. 



Whole body, including the mandibles subopaque or faintly 

 shining 



Hairs very sparse, pale yellow, present only on the clypeus, 

 mandibles and anal segments of the gaster. Body and appenda- 

 ges covered with short, pale and not very abundant pubescence. 



Pale yellow throughout, teeth of mandibles brown, eyes black. 



Three specimens from Jalapa. 



21. — Prenolepis steiuheili Forel. 



Several workers from Orizaba agree very closely with typi- 

 cal Costa Rican specimens received from Professor Forel. Two 

 males and two females from Jalapa seem also to belong to this 

 species. 



22. — Caiuponotus planatus Roger. 

 Several major and minor workers from Orizaba. 



