170 



INSECTS OF SAMOA. 



• Genus Idiocerus Lewis. 



Idiocerus Lewis, Trans. Ent. Soc. Lond., I, p. 47, 1834. Genotype I. adustus H.S. 

 8. Idiocerus tutuilanus, n. sp. (Text-fig. 6). 



Head distinctly wider tlian pronotum ; eyes large ; vertex short, scarcely 

 as long as width between eyes, sinuately narrowing from antennae to clypeus ; 



clypeus half longer than width 

 at base, expanded apically ; apex 

 broadly rounded ; lorae fusiform ; 

 margin of cheek nearly straight ; 

 pronotum nearly three times as 

 wide as length at middle ; hind 

 border shghtly concave ; elytra 

 with obscure venation ; four 

 apical cells and broad appendix. 

 Male valve rounded behind, plates 

 elongate. 



Pale yellow, with pronotum 

 except two oval spots, scutellum 

 except central stripe and apex and 

 inner claval border and irregular 

 stripes toward apex, black or dark 

 fuscous. Beneath yellowish, legs yellowish, hind femur and tarsal claws blackish. 

 Length, 4 mm. 



Three specimens: one male (holotype) Upolu, Vailima, i.l925, 1,200 ft. ; 

 one male (paratype) Malololelei, iv.l925, Buxton and Hopkins ; and one male 

 (paratype) Tutuila, xii.1918, Kellers. 



This species will fall into a subgenus in which the male antennae do not 

 have the flat discs of typical Idiocerus. 



Text-fig. 6. — Idiocerus tutuilanus, n. sp. : a, dorsal 

 view ; b, face ; c, male genitalia. 



Xestocephalus Van Duzee. 



XestocepJialus Van Duzee, Trans. Am. Ent. Soc, XIX, p. 298, 1892 ; Bull. Buffalo Soc. Nat. Sci., 

 . V, pp. 197, 214 (1894). Genotype pulicarius Van. D. ^ _ 



" Head tumid and rounded before ; ocelli placed on the rounded anterior 

 edge superiorly, distant from the eyes ; vertex convex, closely evenly punctured, 

 without longitudinal rugae." (Van Duzee.) 



