aTil rulletin: museum of comparative zoology. 



declivity large. Kpinotal spines long, stout at basal two fifths, then slender; 

 little divergent, their distance apart at tips about equal to their length, directed 

 backwaril and upward. Petiole broader than long, sloping above, anterior 

 border straight, posterior border curved and at middle subgibbous; spines 

 rather thick at basal half, slender apieally, a third longer than their distance 

 apart at base, extended parallel to sides of first gastric segment. 



Moderately shining. Mandibles finely striate. Head, thorax, and base 

 of epinotmn with strong, regular and entire striae, which are transverse on 

 posterior portion on cheeks, oblique on clypcus, and longitudinal on thorax 

 and epinotum. Epinotal declivity and posterior surface of petiole rugose. 

 Gaster finely and densely rugulosc. 



Front and vertex with very sparse, long, erect hairs. Head and thorax 

 with a thick covering of rich golden pubescence. 



Black throughout. 



Florida: ]\Ialiali. 



Described from a unique worker. The curious, strong, and regular 

 sculpture and the slender downward, curved humeral spines are very 

 characteristic. 



108a. PoLYRHACHis (Hedomyrma) santschi Mann, subsp. camp- 

 BELLi, subsp. nov. 



Several workers differ from the typical form in having the golden pubescence 

 on gaster more dense, the petiolar spines shorter and in the sculpture of the 

 head. The striae of vertex extend longitudinally back to the posterior border 

 of the occiput at the middle where they are met obhquely by transverse striae 

 that extend down the sides of the occiput and cheeks. In santschi the occipital 

 region is transversely striate. 



Russell: West Bay. 



In l)oth forms of the species the epinotal spines are strongly longi- 

 tudinally striate on the basal half. Type. — M. C. Z. 9,192. 



109. PoLYRHACHis (Hedomyrma) geminatus, sp. nov. 



Worker. Length 5 mm. 



Head slightly longer than broad, sides in front of eyes feebly convex, poste- 

 rior border broadly rounded. Clypeus convex, obtusely carinate; lobed and 

 acutely bidentate at middle of anterior border. Frontal carinae not widely 

 separated, moderately elevated, parallel behind. Eyes convex, situated at 



