2>S^ Bnlktin Amcrkan Museum of Xatural History. Vol. XXII. 



the flora and physical conditions are the same as those of Culebral 

 It is highly probable that Ph. ruegaccpliala, perhaps accidentally 

 introduced from the island of St. Thomas a few miles to the east, 

 had exterminated all the other ants which must have previously 

 inhabited Culebrita. The absence of tmgacephala on Culebra is per- 

 haps to be explained by the presence of the equally prolific and 

 pugnacious fire-ant. 



6. Tetramorium caespitura Liu}i. — Professor Verrill says that he 

 has recognized this species in the Bermudas. We should have ex- 

 pected the tropicopolitan T. giiin'eense Fabr. instead, and venture to 

 doubt the correctness of his identification. Although T. ccespitum 

 has been introduced into the United States, I believe there is no record 

 of its introduction into a subtropical countr^^ T. guineense, however, 

 is a well-known tramp species, occasionally found even in our northern 

 hot-houses. 



Subfamily Campoxotix.^. 



7. Brachymyrmex heeri Ford. — -Numerous workers, winged 

 females and males of the typical form of this diminutive ant were 

 collected during July from two colonies by Professor Kincaid. This 

 species together with the following variety has probably been intro- 

 duced with plants from its original home in the West Indies. 



8. Brachymyrmex heeri Forel var. obscurior Forel. — Three 

 workers collected by Professor Kincaid. 



9. Prenolepis kincaidi sp. nov. 



Worker. Length 1.3- 1.5 mm. 



Head rectangular, a little longer than broad, as broad in front as behind. 

 Eyes flattened. Clypeus very convex, subcarinate, its anterior border emarginate 

 in the middle. Front with a transverse welt or swelling between the antennal 

 insertions. Antennae slender, scapes extending a little more than J their length 

 beyond the posterior comers of the head. Thorax robust; pro- and mesonotum 

 of about eqiial length; mesoepinotal depression rather shallow and much shorter 

 than the distance between the two stigmata. Epinotum rounded in front, 

 flattened behind, without a distinct angle between the basal and declivous 

 surfaces. Petiole small and narrow, with a blunt and rounded node. Gaster 

 of the usual shape. Legs rather long. 



Surface of body, especially the pleurae, smooth and shining, without per- 

 ceptible sculpture. 



Hairs black, erect, obtuse and abundant on the head, thorax and gaster, 

 more scattered on the legs. The antennal scapes have a few erect white hairs. 

 Pubescence white, very sparse and visible only on the head and legs. 



Body dark brown, head and gaster blackish above; antennae, mouthparts, 

 tibiae and tarsi vellow. 



