328 bulletin: museum of comparative zoology. 



The sculpture is more delicate than in the other species I have seen. 

 The diflFerence in sculpture among the species of Vollenhovia is easy to 

 see but difficult to describe. 



57. Vollenhovia foveaceps, sp. nov. 

 Worker. Length 1.50 mm. 



Head longer than broad, slightly narrowed in front, with feebly convex sides 

 and rather strongly concave posterior border. Mandibles 5-dentate. Clypeus 

 nearly twice as long as broad, with flattened surface. Antennal scapes thick- 

 ened distally, extending about three fourths the distance to occipital corners; 

 funicular joints, except the first and those forming the club, strongly trans- 

 verse. Eyes convex, situated well in front of middle of sides of head. Thorax 

 flattened, with prominently angulate humeri. Mesoepinotal suture feebly 

 discernible from above. Basal and declivous portions of epinotum rounding 

 into each other, the surface of the latter flat. Petiolar node from above a 

 little longer than broad, with straight sides; in profile, thick, about as high as 

 long, highest at anterior margin, broadly rounded above and behind and 

 declivous in front, anteroventrally with a stout tooth which is broad and 

 rounded apically. Postpetiole nearly twice as broad as petiole, a little broader 

 than long and evenly rounded at sides; in profile as high as long and rounded 

 above. 



Gaster elongate oval. Legs long, femora and tibiae thick. 



Shining throughout. Mandibles impunctate. Head with foveolate punc- 

 tures which are sparse on occiput and vertex and more abundant in front; 

 front and sides delicately, reticulately striolate, except for a narrow median 

 smooth space extending down front and vertex. Pronotum, mesonotum, 

 sides of epinotum, petiole, and postpetiole with very sparse but strong foveae. 

 The rest smooth, though under a strong lens a subtle reticulation is discernible. 



Scattered, sparse, very long, fine, and erect hairs present on head, body, 

 and antennae, and shorter semirecumbent hairs on legs. 



Head light brown with a darker blotch on vertex; legs and antennae yellow- 

 ish, the rest dark brownish red. Pilosity yellowish. 



/^ewa/e (dealated). Length 1.8 mm. 



Very similar to the worker, with the usual sexual modifications. The ocelli 

 as large as the cephalic foveae. Pronotum with angulate humeri. Mesono- 

 tum flat, transversely oval. « 



Thorax, epinotum, petiole, and postpetiole with scattered foveolate punc- 

 tures as in worker, mesonotum with more abundant punctures. 



Pilosity more abundant than in worker. Color darker. 



Ysabel: Fulakora. 



