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RESUME 



Anidiii; the numerous Neuropteious insects of Japan, including Corea 

 and l'\)nnosa, alone the known s[)ecies of the Dilaridae are very few. The 

 first one of the family in the re;^ion just referred to is Dilar japonicus 

 described by ?iIacLaciilaX {jf^ in 1883. Since this species had been described, 

 an\'one was not recorded from Japan until 1914. At the same }"car NakaHARA 

 (y) described a new species under the name of D. nohirae from Honshu (the 

 Alain Island), and also Na\"^s (/y?i recorded the distribution ofi?. scptcntfionalis 

 in Corea as -well as in Siberia. ^\nd recently OkamotO and the author 

 (//) tlescribed a new species, Lidar forviosamis, from Formosa. Though 

 four species ha\e hitherto been recorded any systematic or general studies 

 were not attempt except a few fraL;nientar)' description, so that a study of 

 them ma)- be of some interest to general entomologists. In this paper, the 

 author treats his studies under 8 chapters, namely ; introduction, characters 

 of the funih-, liistorical review, morphology (external), biology, systematic 

 notes, classification, and geographical distribution. 



a) Reference is made by number (italic) to " Literature citetl." 



