2G4: 



Lcngtli of body 5.00-5.50111111. 



Length of head with mandibles 2.50-2.63 mm. 



Lengtli of head witliout mandibles T.63 mm. 



Width of head 1.25-1.31 mm. 



Width of pronotum 0.90 u. 97 mm. 



Length of pronotum 0.56-0.63 mm. 



Worker: Head yellow; abdomen whitisli. Head sparingly pilose; 

 abdominal tergites densely covered with hairs. 



Antennae 15-jointed, basal joint cylindrical, 2nd nearly as long as 3rd 

 and 4th taken together ; pronotum subreniform, its anterior and posterior 

 borders indented at middle, narrower than mesonotum ; metanotum 

 broader than mesonotum. 



Length of head 4.00 mm. 



Width of head 1.28 mm. 



Width of pronotum 0.81 mm. 



Hal).: Honolulu, Oalm. Hawaiian Islands. 



TJoniarks: The nearest relative of the present speeies seems 

 to lie ( '()j)(o{('j-ntes formosanuj^ Shiraki, from the Island of 

 Formosa, ^vhieh canses most serions damage to wooden struct- 

 ures. It differs, however, from the latter in having the fol- 

 lowing characters: Imago is provided Avith larger ])ronotnin ; 

 head of the soldier does not converge anteriorly, measuring 

 1.25-1.. '51 mm. X l.Bomm., instead of l.lSnim. X 1.56mm. 



Notes on Callithmysus microgaster (Sharp). 

 (Coleoptera, Plagithmysides). 



BY O. IT. SVVEZEY. 



This beetle was first collected by Blackburn (o specimens), 

 and described as a Clytarhis by Sharp in Tr. Ent. Soc. Lon- 

 don, p. lOo, ISTO. It is next mentioned in Tr. Dublin Soc. 

 (2), III, ]). 201, 1S85. "Rare, in decaying wood on the 

 mountains near Honolulu, at an elevation of 2000 feet. 

 June". (Blackl)urn). It is figured in the same ^publication. 

 (PL V, fig. 46). 



In Fauna Hawaiiensis, II, p. 113, 1900, Sharp places it in 

 the genus Callithmysiis, and adds var. hirtipes{ '() based on 

 ''One individual on the ridge leading from the head of Pauoa 



Proc. Haw. Entom. Soc, IV, No. 2, June, 1920. 



