CHRYSOMELIDAE. 181 



2. Pycnophthalma tutuilana, sp. nov. (Text-fig. 2). 



Body small. Upper side greenish, under side shining pitch-black, legs and 

 antennae yellow-brown, six apical segments of antennae fuscous. 



Head deeply imbedded in prothorax, vertex invisible from above. Eyes 

 very large, occupying greater portion of head. Clypeus slightly convex, punctate, 

 each puncture bearing a little hair. First segment of antennae long, thickened 

 and club-shaped ; second small, rounded ; third, fourth, and fifth segments 

 slender and about equal to each other in length ; sixth and seventh equal ; 

 eighth to eleventh segments equal to each other, the last blunt, not pointed ; 

 six apical segments more hairy. Prothorax : front edge together with front 

 edge of prosternum forming a complete 

 circle surrounding head ; anteriorly and 

 laterally a deep fossa ; upper surface 

 closely punctate ; punctures on discal area 

 appearing somewhat elongate and, although 

 without any definite arrangement, tending 

 to converge towards apex ; on lateral area 

 punctures are coarser and coalesce with 

 each other. Scutellum smooth, impunctate 

 and appearing imbedded in thickened 

 elytral margin. Elytra : anterior margin 

 thickened ; each elytron with ten longi- 

 tudinal rows of punctures placed in deeply 

 excavated channels ; counting from suture 

 and including scutellar row, the sixth row, 

 which is internal to humerus, is very deeply 

 excavated ; intervals between rows raised, 

 fairly broad, very minutely punctate and bearing very fine hairs ; the rows of 

 punctures meet in pairs on apical area. Under side : metasternum with median 

 longitudinal impression. Anterior and middle coxal cavities rounded. Abdominal 

 sternites finely and closely punctate, bearing very fine scattered whitish hairs. 

 Other structures as stated under generic diagnosis. 



Length, 2 mm. 



Tutuila : Pago Pago, 10.ix.1923 (Swezey and Wilder), type. 

 Type in the Bishop Museum, Honolulu. 

 Described from one example. 



Text-fig. 2. — Pycnophthalma tutuilana. 

 sp. n. x 30. 



