A Study of S(»ine Ergatogynic Ants. 315 



doisally: latt-rally. liuwever. tlie scutelluiii is not at all di.stiiict, and 

 tlie inetan(»tiini lias fused witli tlie adjoining parts. The pronotum, 

 Tiiesonotnni and teg^nlae arc distinct. everytliin<^- eise lias fused, even 

 to an obliteration ot tlie sntures between tlie meso- and meta-thorax. 

 No ocelli are present iFig-. Ka). 



TIh' specimen witli tlie dark coloring lias even fewer parts 

 distinct. tlie scutelluin lias fused witli tlie niesonotum; dorsallj' the 

 nietanotum is distinctly niarked otf but laterally it fuses with the 

 epimerite of the third thoracic seg^nient ; tlie epimerite of the meso- 

 tliorax is distinct. all the otlier i)arts have fused. No ocelli are 

 present (Fig. Kbi. 



Cri/ptocerus ai^tecus Forel. 



Tu a liest of CrijptocerKS azfecus collected at Cuernavaca, j\[exico, 

 by Dr. WM. ^\. Whkklek, a soldier was found possessing rudimentary 

 anterior wiiigs: no traces even of posterior sutures existed! As no 

 form siniilar to tliis has ever been recorded a description of this 

 peculiar individual does not seem out of place. 



The queen of this species was not found but that of a kindred 

 species has been described by Forel and po.ssesses the typical thoracic 

 structure. 



In the soldier the structure of the tliorax is very simple. The 

 tliree thoracic segments are distinctly separated. both dorsall}' and 

 laterally: the i)arts of the Segments have fused completely. 



The' speciim'u possessing the rudimentary fore wings is exactly 

 like the S(»ldit'r in every other respect. The wings are attached to 

 the prongs of the mesothorax. 



The typical worker of this species sliows still further simplifi- 

 catimi. Laterally the thoracic segments are distinct but dorsally 

 the pro- and meso-thorax have fused, and the prongs. which are so 

 pruminent in the soldier, are modified. 



Pheidole ceres V\\\v.\:\a:\{. 



Another case of apparent atavism. similar to that shown l)y the 

 niicrogyne of F. )iifidii-cnfris, is exhibited by a microgyne of P^e/f?o/<' 

 rerrs. belonging to a nest taken at I^oulder. Col.. by Hev. P. J. 

 Schmitt. (). S. B. In addition to the niicrogyne the nest contained 

 a true queen. soldiers and workers. twenty-three individuals in all. 

 The ([ueeii. .soldiers and workers are dark brown. indeed alniust black 



