CHRYSOMELIDAE. 



189 



Head with vertex convex, uniformly and strongly punctate without any 

 marked depression or impressed lines. Antennae extending to apical area of 

 elytra ; first segment long and 

 club-shaped ; second thick, 

 about one-half as long as 

 first ; third slender and longer 

 than second ; fourth longer 

 than third ; following segments 

 about equal to each other in 

 length, and slightly and gradu- 

 ally increasing in thickness. 

 Prothorax broader than long, 

 narrowed in front ; posterior 

 angles rounded, not acute ; 

 upper surface convex in centre, 

 sloping down at sides and 

 more so in front, strongly and 

 closely punctate, punctures 

 coalescing. Elytra as broad 

 at base as prothorax ; sides 

 parallel to a certain extent, 

 which gives the insect a broad, 

 squarish appearance as com- 

 pared to S. variabilis ; a 

 certain area at the base on the 

 inner side of the humerus 

 slightly convex ; confusedly 

 and strongly punctate, the 



punctures closer together and larger than those of S, variabilis 

 in the generic diagnosis. 



Length, from a little over 2 mm. to 2\ mm. 



Upolu : Malololelei, 2,000 ft., iv.1924, 7 examples ; 22.xi.1924, 2 examples, 

 one of which is the type. 



Tutuila : Pago Pago, 16.iv.1924, 1 example (Bryan). 



Type in the British Museum ; paratype in the Bishop Museum. 



Described from ten examples. 



Text-fig. 6. — Stygnobia minuta, sp. n. x 26. 



Under side as 



