1907.] Wheeler, Ants from. British Honduras. 273 



21. Cryptocerus angulosus F. Smith. 

 (Plate XI, Figs. 1-3.) 



Cryptocerus angulosus F. Smith, Trans. Ent. Soc. London, 1867, p. 525, pi. xxvi, 

 fig. 7. 6 . 



Cryptocerus jucundus F. Smith, Trans. Ent. Soc. London, 1876, p. 606, pi. xi, 

 Fig. 2, §. 



Cryptocerus angulosus Emery, Bull. Soc. Ent. Ital., XXII, 1890, p. 39, tav. 

 ix, fig. 9, § . 



Soldier. (PI. XI, Figs. 1 and 2.) Length: 4.6-5 mm. 



Head surmounted by a disk, which is as long as broad, with straight, parallel 

 sides and rounded anterior and posterior corners. The floor of the disk is convex 

 in the middle and anteriorly, and very concave on the sides, with a thin, reflected 

 and irregularly crenate border. Its anterior border is semicircularly excised in the 

 middle, and encloses the mandibles, each of which has a long, acute apical, and a 

 few indistinct basal teeth. Posterior corners of head projecting below and beyond 

 the disk, rather acute, turned upwards and irregularly crenate. Thorax as broad 

 as long, about twice as broad in front as behind. Promesonotal and mesoepinotal 

 sutures very distinct, the former subsemicircular, the latter but slightly curved. 

 Pronotum with sharp, flattened anterior angles and a strong transverse, irregularly 

 crenate, posterior crest, narrowly interrupted in the middle. Mesonotmn somewhat 

 more than half as broad as the pronotmn, produced on each side into a short, sharp 

 angle. Epinotum nearly as broad as the mesonotum, with thin, flat lateral bor- 

 ders, except in front where it is suddenly narrowed and produced into a small 

 rounded lobe on each side. The lateral borders converge posteriorly and have 

 blunt posterior angles. Petiole and postpetiole alike in shape and both with 

 well-developed, recurved lateral spines, these on the petiole being, however, dis- 

 tinctly narrower, more acute and less flattened than those on the postpetiole. Grasor 

 less than twice as long as broad, flattened, bluntly pointed behind, cordate in front, 

 with thin, slightly upturned anterior borders. Legs robust. 



Subopaque; upper surface of head shining. Head and thorax foveolate, the 

 former more coarsely and much more sparsely, especially on the concave portions of 

 the disk. Petiole, postpetiole, gaster and legs finely and densely foveolate-punctate. 



Hairs glistening white, very short, scale-like and appressed, one to each of the 

 foveolse on the head and thorax; much smaller and denser on the remainder of the 

 body. Edge of cephalic disc with a fringe of short, erect, clavate hairs. 



Black; upper surface of head, pronotum, tibia?, terminal tarsal joints, scapes 

 and basal funicular joints of antennae, brownish yellow. Lateral borders of epin- 

 otum, spines of postpetiole and all but a large lozenge-shaped area on the disc of 

 the first gastric segment, sordid white, as are also the posterior borders of the re- 

 maining gastric segments. 



Worker. (PI. XI, Fig. 3.) Length: 3.5-4 mm. 



Head not surmounted by a disk, longer than broad, narrower in front than 

 behind, with sides straight and gradually converging in front, and with rounded, 

 thin anterior lobes and distinct posterior angles. Anterior border with a semi- 

 circular excision for the mandibles. Thorax nearly 1| times as long as broad, 

 flattened above, without a pronotal crest; promesonotal .suture ob,solete, meso- 

 epinotal suture very indistinct. Pro- and epinotum each somewhat broader than 



{March, 1907.] 18 



