128 Bulletin American Museum of Natural History. [Vol. XXII,] 



each side a rapidly tapering spine about half as long as those'of the pronotum, 

 and curved upward, outward and especially backward. Basal surface of epi- 

 notum i^ times as long as broad, terminating behind in a pair of very bhmt 

 flat spines, which are directed backward and somewhat outward and upward. 

 The ridge along the side of the basal surface is sometimes crenate or serrate and 

 is always contintied down along the side of the declivity, which is very sloping 

 and about as long as the basal surface. Petiole seen from above as long as 

 broad, very thick above where it bears a pair of long, somewhat flattened, hook- 

 shaped spines, which diverge laterally and somewhat posteriorly from their 

 very insertions. Gaster spherical. 



Head, legs and gaster shining, finely shagreened. Mandibles finely striated. 

 Thorax and petiole opaque, punctate-rugulose, the dorsal surface of the former 

 more uniformly punctate. Upper anterior surface of the petiole very finely 

 and transversely rugulose. 



Mandibles, legs and occiput with sparse, suberect grayish hairs. Pubescence 

 pale, very sparse on the head, legs and gaster; more abundant, but by no means 

 concealing the sculpture, on the pleurae and base of the gaster. 



Thorax and petiole dark red, tips of thoracic and petiolar spines and 

 remainder of the body deep black. 



Several workers taken by Mr. Hans Sauter at Okayama. Smith's 

 types and the specimens studied by Forel were from Hiogo. Smith 

 mentions the species as occurring also in Hong-Kong. Bingham has 

 described a closely related species, P. craddocki from India. In this 

 species the pronotal spines do not point downward, the meson otal 

 spines are nearly vertical and the petiole is "surmounted by two 

 cylindrical spines which rise vertically and are close together and 

 parallel for three-fourths of their length from the base." In P. 

 lamellidens the petiolar spines diverge from their very bases. 



EXPLANATION OF PLATE XLI. 



Fig. I. Cremasiogaster laboriosa F. Smith var. matsnmurai Forel. Worke, 



Fig. 2. Polyrhachis lamellidens F. Smith. Worker. 



Fig. 3. Iridomyrmex itoi Forel var. abhotti var. nov. Worker. 



Fig. 4. T echnomyrmex gibbosus sp. nov. Worker. 



Fig. 5. Sysphincta watasei sp. nov. Worker. 



Fig. 6. Pachycondyla {Pseudoponera) santert sp. nov. Worker. Fig. 6a 

 antennal funiculus of same. 



Fig. 7. Pristomyrmex japonicus Forel. Worker. 



Fig. 8. Pheidole nodus F. Smith. Soldier. 



Fig. 9. Pheidole nodus F. Smith. Worker. 



Fig. 10. Vollenhovia emeryi sp. nov. Worker. 



Fig. II. Vollenhovia emeryi sp. nov. Worker, in profile. 



Fig. 12. Strumigenys godeffroyi Mayr var. lewisi Cameron. Worker. 



Fig. 13. Euponera {Brachyponera) solitaria F. Smith. Worker. 



Fig. 14. Stenamma {Messor) aciculatum F. Smith var. brunneicorne Forel. 



Thorax and pedicel of worker in profile. 



