NO. 1794. HYMENOPTERA FR02I FORMOSA— ROIIWER. 479 



between- the two middle ones somewhat less than the distance 

 between the second and tliird. Bright metalHc green with a few blue 

 spots on head, thorax, and the basal segments; most of the fiagellum 

 and tarsi black. Wings dusky hyaline, venation dark brown. 

 Almost without white hair. 



Type-locality. — Horisha, Formosa. One female collected by Mr. 

 T. Fukai, in whose honor the insect is named. 



Type.— C&t. no. 13373, U.S.N.M. 



CHRYSIS (Tctrachrysis) LUSCA (Fabricius). 



One female of this species was collected by Mr. T. Fukai. It is 

 a widely distributed species within the oriental region. 



Family VESPID^. 



POLISTES STIGMA (Fabricius). 



Represented by one small worker. 



POLISTES HEBR.ffi;US (Fabricius). 



Three workers of a pale variety. 



POLISTES (Gyrostoma) SCHACH (Fabricius). 



Both females and workers were collected. 



VESPA DUCALIS Smith. 



A single female of this species, which occurs both in India and China. 



VESPA MANDARINIA Smith. 



A female and worker of this large species, which is very common in 

 Japan, occuring in China also. 



Family EUMENIDiE. 



RHYGCmUM FLAVOLINEATUM (Smith), variety. 



Two females, wliich may represent a distinct species, were collected. 

 They agree with the variety given by Bingham in the Fauna of 

 British India, except that the pale spot at the emargmation of the 

 eyes is wanting. 



RHYGCmUM BRUNNEUM (Fabricius). 



Males and a female were collected. 



RHYGCHIUM METALLICDM Saussure. 



Two males and a female are assigned to this species with some 

 doubt. The clypeus of the male is entirely black. This is one of 

 the border-line species between RJiygchiuni and Odynerus. The 

 apical three joints of the maxillary palpi are distmctly longer than 

 the third joint. 



