I4''> M H^-a ii& w it Sfi IÖ: #: r. «t * "J la Bi) 



RESUME. 



It lias hitlicrtu bcrii t,rciicrally recognized that in the Coccincllids the 

 iiuniljiT of llu- \cntra! alKlMininal segments is usu;<lly five but rarely sLx, and 

 that the sexes arc iiulistingiiishable externally, except in some cases where 

 the male is smaller in size than the female. 



The only sexual dilference as regards the number of segments was known 

 in Synonycha {S. g-ninJis Thunl).) where the ventral abdominal segments of the 

 female are five in number. 



Besides the difference in number of the \'entral abdominal segments in 

 Synonycha .is stated abo\e, there arc found some more characters in structure 

 of the al)doniinal segments, bv which the two sexes can lie distinguished 

 externall}', for exauii^le, the si.xth ventral segment is complete in the male 

 Epilaclina (excepting E. adomirali.Hs MuLsch-), but entirels bifid in the female 

 (jf the same species, while slightly or deeply notched on the posterior margin 

 in the male Ahnnus. 



As the result of his careful studies the author cannot agree with the pre- 

 vious wiirkers on the external moi-pholog\- of Coccincllids. 



Those such cons[jicuous characters were overlooked b\' them seem to be 

 due to the used materials unfitted for observation, being in dried condition for 

 examination. 



In dry specimens, the abdominal segments contract together so as to make 

 distinguishment of the last segment very difficult. 



The present work is based on the li\'ing specimens as far as possible, but 

 in a few cases where such specimens were not at hand alcoholic and dried 

 specimens were empro}'ed. 



/// the Zoological Institute, 



Kyushiu Imperial University. 



