34 



PBOCEEDINGS OF THE NATIONAL MUSKUM. 



CRYPTOCERUS CRISTATUS Emery. 



Honduras: Carnelina. 



CRYPTOCERUS VARIANS F. Smith. 



Honduras : Ceiba. 



CRYPTOCERUS MINUTUS (Fabricius). 



Honduras: Ceiba, Monte Cristo, Tela. 



CRYPTOCERUS MASCULATUS F. Smith. 



Honduras: San Juan Pueblo, Choloma. 



A colony at Choloma was nesting in Bull's horn Acacia. 



A'CANTHOGNATHUS LENTUS, new species. 



^Vo7'ker. — Length (including mandibles) 3.50-4 mm. (fig. 16.) 

 Head about one and threo-eigliths times as long as In-oad and more 

 than twice as broad at occiput as at anterior border; sides in front 



of eyes nearly straight, con- 

 verging, with a small angulate 

 projection at one-third the dis- 

 tance from the anterior mar- 

 gin; sides behind eyes convex: 

 occipital corners narrowly 

 rounded, the border deeply con- 

 cave. Mandibles as long as 

 head, straight, of subequal 

 width throughout, the apex 

 M'ith three slender teeth the first 

 and third of which are equal 

 and the middle longer; basal 

 inferior spines about one-fifth 

 as long as the mandibles, 

 slightly curved and feebly bi- 

 dentate at apex. Clypeus nar- 

 row behind, extending between 

 frontal lamallae, in front flatly impressed at middle, with the lateral 

 borders slightly elevated and rounded. Antennal foveae large, ex- 

 tending to opposite anterior margin of eye. Antennae slender, scapes 

 vei*y slender for two -thirds their length, then incrassate and narrowed 

 again at tips, slightly surpassing occipital corners: first funicular 

 joint nearly as long as the four succeeding joints together, second 

 joint longer than the third, joints 3-T gradually increasing in length, 

 joint 8 distinctly longer than the seventh, penultimate joint two- 

 thirds as long and much more slender than the terminal. Eyes 

 moderately large, little convex in profile, armed with pair of stout 



Fig. 16. — Acanthogxathus lentus, new 

 SPECIES. Head of worker. 



