146 Zoologica: N. Y. Zoological Society [HI; 4 



jecting in the middle, its sides impressed, their anterior borders 

 bisinuate. Head behind the eyes narrowed but more convex 

 and rounded than in damnosa. Epinotum somewhat longer and 

 slightly more angular in profile, the ventral spine of the petiole 

 much larger, nearly as large as in the female, the terminal dorsal 

 segment of the thorax of a different shape, its posterior border 

 produced as a narrow blunt point in the middle. 



Shining, like the worker; even the mandibles and head 

 very smooth and shining, the former striolate at the tips, punc- 

 tate at the base, the head more densely punctate anteriorly as in 

 the female. 



Pilosity and pubescence much as in the worker. 



Black ; mandibles testaceous, inf uscated at the base ; antennae 

 fuscous, first funicular joint and tips and bases of scapes yellow- 

 ish. Thoracic and abdominal sutures brown. Legs yellowish 

 or pale brown, the femora, except their tips and bases, dark 

 brown, the extensor surfaces of the hind tibiae infuscated. Wings 

 as in the female. 



Described from many specimens from Kartabo, nesting, like 

 the preceding species, in the petioles of large Tachigalias. Though 

 closely related to damnosa, arhoris-sanctie, etc., this species seems 

 to me to be specifically distinct. It also resembles triplaridis. 

 Forel and another species, which is found in Triplaris surina- 

 ynensis near Kartabo and will be described elsewhere. Among 

 my material there are also two varieties of maligna found nesting 

 in some of the smaller Tachigalias ; namely : 



6. — Pseudomynna maligna var. cholerica var. nov. 



Worker. Length: 3-3.5 mm. 



Distinctly smaller than the typical form and similarly col- 

 ored, but the lighter parts are more extensive and often of a more 

 washed-out, sordid yellow, whereas the darker parts are more 

 piceous or blackish. The clypeus, cheeks, petiole and postpetiole 

 are pale yellow, as are also the thorax, except the base of the 

 epinotum and a fuscous cincture in the mesonotal region. The 

 gula and first gastric segment are apt to be paler than the 



