. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 460 Bulletin Museum of Comparative Zoology, Vol. 157, No. 6. Figures 158-161. Pristomyrmex quadridens Emery. 158A: Worker head, full-face view; 158B: Showing a tooth on the center of ventral clypeus; 159: Worker, lateral view; 160A: Queen head, full-face view; 160B: Showing a tooth on the center of ventral clypeus; 161: Queen, lateral view. formula 1,3. Frontal carinae distinct, ex- tending to the level of the posterior mar- gins of eyes. Antennal scrobes shallow and short. Frontal lobes weak; thus, the anten- nal art
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 460 Bulletin Museum of Comparative Zoology, Vol. 157, No. 6. Figures 158-161. Pristomyrmex quadridens Emery. 158A: Worker head, full-face view; 158B: Showing a tooth on the center of ventral clypeus; 159: Worker, lateral view; 160A: Queen head, full-face view; 160B: Showing a tooth on the center of ventral clypeus; 161: Queen, lateral view. formula 1,3. Frontal carinae distinct, ex- tending to the level of the posterior mar- gins of eyes. Antennal scrobes shallow and short. Frontal lobes weak; thus, the anten- nal articulations are almost entirely ex- posed. Antennal scapes, when lying on the dorsal head, slightly sui"passing the occip- ital margin of head. Eyes usually contain- ing seven to eight oinmatidia in the longest row. Occipital margin feebly concave. Pro- file of alitrunk and pedicel segments as in Figure 159. Pronotum armed with a pair of acute short spines. Propodeum with a pair of triangular teeth or short spines that are about equal in length to the pronotal armaments. Metapleural lobes rounded or with a subtriangular apex. Petiole node in profile nodiforni; its anterodorsal angle high, and the dorsum sloping downward posteriorly. Postpetiole in profile rounded dorsally, in dorsal view broadening from front to back and usually longer than broad but sometimes about as long as broad. Dorsum of head between the fron- tal carinae with scattered foveolate punc- tures; intensity and number of punctures very variable: The punctures are some- times dense and large but sometimes few, small, and shallow. Dorsum of alitiimk with scattered foveolate punctures, varying from a few to many. Petiole, postpetiole, and gaster unsculptured, smooth, and shining. Dorsal surfaces of head and ali- trunk with nuinerous erect or suberect hairs. Two pairs of hairs usually present on the dorsum of petiole node and a pair usu-. Please note that these images are extracted from scanned page images tha
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