324 ;\Iah(iaret Holliday, I 



I 



ordinary workevs also were well developed and contaiiied matiire 1 

 eggs; tlie tubules varied from two to eight on each side. 



4. LcptotJiorax emersoni Wheeler presents eleven different types ' 

 of feiiiale individiials , distinguished by external anatomy : queen. 

 microgyne, ergatoid female, tri-ocellate large scutellate form, tri- \ 

 ocellate small scutellate form, tri-ocellate escutellate form, bi-ocellate I 

 large scutellate, bi-ocellate small scutellate, bi-ocellate escutellate, 

 uni-ocellate large and small scutellate forms, uni-ocellate escutellate ' j 

 form, macroergate and microergate. All eleven types possessed well i 

 develoi)ed ovaries, containing mature eggs; tliey had from two to | 

 four tubules on a side; tlie number of eggs in eacli tubule varied j 

 botli on tlie two sides of tlie same ovary and in the ovaries of i 

 different iiidividuals of the same type, as also in tliose of different 

 types. All tlie specimens dissected had better developed ovaries 

 than the queen. Every individual dissected. except two. possessed 

 the r e c e p t a c u 1 u m s e m i n i s ! 



5. In Leptothorax longispinosus Rog., L. curvispinosus Maye, L. 

 ohturator Wheeler and L. canadensis Prov., the sexual phases are 

 represented by males, queens, macro- and micro-ergates. No ergatoid 

 females were found in these species. Among L. canadensis one tri-, 

 one bi-, and one uni-ocellate worker were present. The queens and 

 workers showed a difference in external structure. The ovaries of 

 the workers possessed a Single tubule on each side. No recepta- 

 culum seminis was present! 



6. Ergatoid females of Ponera opaciceps Mayr, Ponera eoarcfata 

 var. pennsijlvanica Bückley and Crcmasfogasfer miwtf/sf^iina Mayr 

 were found. Two ergatoids of P. opaekcps differed from the worker 

 in the size of the eyes, which are 1 arger, and in the structure of 

 the thorax, where fusion had not progressed so far as in the worker. 

 No ocelli were present in these ergatogynic forms! P. roarrtafa 

 pennsylvanica had ergatoid forms differing from the queen in the 

 structure of the thorax onl}^; fusion had taken place in the thorax 

 of the ergatoids. Three ergatoids of C. minutissima were distinguished 

 from the queen by the simplification of thoracic structure. The 

 ovaries of the ergatoid females had one tubule to a side and con- 

 tained no eggs. No receptaculum was present! The queen had two 

 tubules on each side and contained mature eggs. 



7. 'J'liree microgynes of F. pallide-fulva niiidiventris Emery occurred 

 in a Single nest. They differed from the queen by a slight Variation 

 in thoracic structure; fusion had taked place in the metathoracic 



