A Study iif Some Ergatdgynic Ants. 297 



tw<i of tlif latttT wt'i'e Ibund. wiiile in oiie spccinifii. peiliaps an 

 anonialy. tlie node was t'astennl diirctlv tu tlie ahdonien. in fact 

 was tnsed witli it. 



Tlie Paclujcondijla uests are sniall but of tVequent ociiirence; tlie 

 niimber of individuals to a nest varies from teu to a himdred. Most 

 of tlie nests discovered contained from ten to twenty menibers only, 

 a few were very large. liowever. The latter is especially true in 

 late sprin<>-. hut very small nests were fonnd even in early summer. 

 Very often a sing^le individual. indistinunishable from tlie worker, 

 is found nnder a stone, as if preparing to fonnd. a new nest or colony. 

 Durin o- one afternoon eiglit such individuals w^ere collected. 



Out of many nests discovered only two queens were found and 

 the ovaries in these were in a very undeveloped State ; the tubules 

 were very long and slender and contained no eggs. The number of 

 tubules varied in the two forms, one having five oii eacli side, the 

 othfr having live on one side and seven on the other. The reeepta- 

 culum seminis was present in both queens. situated high up on 

 the Vagina, very near the middle of its length. 



Notwithstanding the absence of queens, the nests contained eggs, 

 larvae and itui»ae. A verj' noticeable tliing was the presence of a 

 gi'eat number of winged males in the nests. In one which contained 

 only eight workers, but no queen, twenty winged males were present. 

 In all of the nests, even in tliose containing queens. woi-kers occured 

 witli well developed ovaries, having normal tubules, containing large 

 and ai>parently normal, mature eggs. 



Of the thiity-seven rachycondyla workers dissected, seven had 

 the receptaculun seminis, well developed tubules and eggs, 

 The number of tubules varied greatl}' in the individuals as well as 

 in the two sides of the sanie ovary. Usually two eggs were ripe 

 at a time, but when the number of tubules were larger there was 

 one ripe ^g^ to each tubule. These workers witli the receptaculum 

 had longer tubules and therefore more eggs to the tubule than the 

 ordinary wurkrr. These forms are not distinguishable by their ex- 

 ternal anatomy from tlio.se not possessing the receptaculum. Tliirty 

 ordinary wfirkers wt-re examined: the tubules varied considerably. 

 it being f-xctq>tional to liave the same number of tubules on each 

 side of the ovaiv. The tubules varied in niiiiiber tVom two to nine; 



