418 bulletin: museum of comparative zoology. 



spines brownish; legs and tip of gaster ferruginous. Pubescence 

 white. 



Described from a single worker taken at Porto Velho. The speci- 

 men on which Smith based his description was from Ega (Bates), so 

 it is probable that the species extends over much of the Amazonian 

 region. 



43. Anochetus (Stenomyrmex) emargmahis (Fabricius) subsp. 



rucjosiis Emery. 



Male. Length 7 mm. 



Head, excluding eyes, considerably longer than broad, rounded 

 behind. Eyes very large, each three fourths as broad as the distance 

 between them, convex, as long as sides of head. Ocelli very large and 

 convex. Mandibles, short, feeble, straight, and without teeth. 

 Clypeus truncate at anterior border; surface broadly foveolately 

 depressed at sides. Antennae very long and slender; the first joint 

 twice as long as the second; joints 3-11 cyHndrical, subequal, very 

 long. Thorax narrower than head. Promesonotum convex above. 

 Epinotum in profile evenly rounded. Node longer than broad, in 

 profile triangular, much longer than thick. Gaster long and slender, 

 without a distinct constriction between the first and second segments. 

 Legs long and slender. 



Body shining throughout, smooth, with extremely fine semierect 

 pilosity, which is thickest on the antennae. Head and mandibles 

 with a few coarser hairs. 



Color light testaceous; antennae, excepting first joint, fuscous; 

 eves black. Pilositv white. 



Described from several specimens taken at Manaos, from colonies 

 which were nesting beneath the bases of living palm-tree leaves. 

 Other colonies were found at Porto Velho beneath logs. The male is 

 very active and takes flight readily. 



44. Odoniomachus affinis Guerin subsp. 7nayi Mann. 



The single colony of this form was found living in parabiotic rela- 

 tions with Dolichodenis debilis Emery var. nifescens Mann, an account 

 of which has already been published. 



45. Odontomachus hacmatoda (Linne). 

 Para, Manaos, Porto Velho, and Camp 41, Madeira-Mamore R, R. 



