Mi 



INSECTS OF SAMOA. 



smoky on the dorsal half. In the specimens from Tutuila and Savaii the ground 

 colour of the scutellum is clear opaque yellow. 



Tutuila : Pago Pago, 1 14.xii.l92o (Buxton and Hopkins). Upolu, 1 

 7.vii.l925 (Wilder). Savaii : Safune, 1 $, 5.V.1924 (Bryan). 



'. ' ' 6. Xanthogramma amphoterum Bezzi. 



Bezzi's series of specimens of this species came from Movua and Lautoka,, 

 Fiji, and fxom Rarotonga. The present collection includes a male and female 

 which show several noteworthy differences from the type. 



(J. Shining black borders to third and fourth abdominal segments quite 

 narrow, posterior borders about five times as broad as anterior, on the anterior 

 margins of these segments the shining portion limited to a very narrow band. 



In this specimen the velvety black bands on the third and fourth 

 abdominal segments are broader than in the male ; in the type, according to 

 Bezzi, the reverse is the case. There is no trace of the anterior shining band. 

 Moreover, the yellow transverse bands on these segments, instead of being entire, 

 are widely interrupted and broken up into spots. The individual before me 

 may represent a distinct species. However, in its ensemble of characters, 

 X. amphoterum is supposed to be intermediate between Ischiodon scutellaris 

 Fabr. and Xanthogramma javanum Wied. var. distinctum Kertesz. In default 

 of a series of the forms involved, anything in the shape of a definite conclusion 

 is impossible. Other slight departures from the type are as follows : the 

 antennal prominence is clothed with yellow instead of black hair ; the sides of 

 the face are not whitish but sulphur yellow, and their pile is pale ; the third 

 antennal joint in the male is rather light yellow and as long as broad, with its 

 tip somewhat truncated. 



Tutuila : Pago Pago, 1 18.iv.l924. Savaii : Safune, lowlands to> 

 1,000 feet, 1 4.V.1924 (Bryan). 



7. Baccha praefica Bezzi (Text-fig. 2). 



The present collection includes a number of examples of this interesting 

 species, which was described by its author (op. cit., p. 76, 1928) from the female 

 alone. I therefore give a description of the male below. The female specimens 

 show slight differences from the Fijian material. The short hairs on the front 



