A SfUllv nf Siime Klirittni;Vllir AlltS. 



801 



II. Lejftothofa.t' cniersoHi W'heeler. 



At tliis time tliere was put in niy liaiul a nuist iiiteresting" little 

 aiit, the Tjeptofhora.i cmersoni, tVoni Colebrook, Conn. . recently dis- 

 covered and nanied by Dr. WM. M. W'hkelek (\\'heeli:ii 1901). 



Differeiices weie inimediately noticed in tlie size of tlie ants, 

 and a Separation based on tliis was begun when it was discovered 

 that otlier and niore imjiortant diöerences existed , namely tlie pre- 

 sence of oetdli in some and variations in the structure uf the thorax. 

 The division based on these more ftmdimental diiferences is, however, 

 not iierfectly satisfaetory since the groups ovedap eaeh other to 

 some extent. (Queens, microgynes, ergatoid females, tri-, bi-, and 

 uni-ocellate workers, niacro- and micro-ergates were readily distin- 

 guished on careful examination. The qneens. microgynes and erga- 

 toids do not Vary greatly in size, but when oeellate A\'orkers are 

 readied. forms occnr, regardless of thoracic structnre. varying in 

 size from those as large as the queen or ergatoid to those as small 

 as the most minnte microergates. The followiug table is given to 

 show the ditferent forms that oecur. Xiunbering is begnn with the 

 microergates. 



Feniali 



Wiiiired 



jXI. Queeu 



Ix. Micrnoyue 

 IX. Ei-oatoid 



Aplei- 



Tri-ocellate 



Oeellate 

 workers 



VIII. scntellate ^\ ^^^-^^ scutellum 



\VII. escutellate 



/ VT «rntellafp '^' ^^^'^^ scutelhim 



Bi-ocellate ( ^ ^- ^^'"'^'^'^^«^ \bi smaU scutellura 



( V. esaitellate 



i i\- tut '*) large sciitellnm 



Uni-ocellate ^«^"^ellate ^,^^ ^^^jj geutellum 



[ III. escutellate 

 IL Macroergate 

 I. Microergate 



Tlie ([ueen, microgynic and ergatoid forms have three oeelli. 

 The thoi-ax of the queen is very nearly typical.') The pronotum 

 and sternite of the jtrotliorax. the raesonotuni. paraptera. scutelhim 

 and wings of the mesothorax are all distinctly .«^eparated; the epi- 

 merite, episternite and sternite are not distinct. In the metathorax 

 the metanotum. wings and epimerite are distinctly separated. the 



1) Xomenclature from Emeky (Intorno al torace delle Formiche.l 



