172 Transactions. — Zoology. 



much longer; the rest subequal, a Uttle shorter than the 

 third ; all the five last are slender, numerously ringed, and 

 bear very short hairs. Legs very slender, longish ; tibia and 

 tarsus numerously ringed, the tibia longer than the two joints 

 of the tarsus together. Eyes brown or dark-red, slightly con- 

 vex, facetted, divdded in the middle by a single median smooth 

 space. 



Adult male similar in general form and colour to the 

 female, but smaller ; length about ^V^- Wings proportion- 

 ately much shorter than those of the female, not extending in 

 repose beyond the abdomen. Abdomen exhibiting the dorsal 

 cornicle, and ending in two rather slender cyhndrical forcipate 

 processes enclosing the penis, which is curved and slender. 



Pupa stationary, enclosed in a rather solid yellow test, 

 .about Tj\;in. long. X^iewed dorsally, the test is elliptical, the 

 pupa appearing indistinctly through it ; the thoracic portion 

 brown, the abdominal region obscurely segmented; the abdo- 

 minal orifice subcircular ; there are several shortish hairs on 

 the edge and three pairs of longer ones on the surface, one 

 pair at the head, one median, and one at the cornicle. Viewed 

 ventrally, the rudimentary feet can be detected. Viewed 

 sideways, the test is of considerable thickness; the rudi- 

 mentary organs project slightly on one surface and the 

 cornicle on the other. 



Larva elliptical, about J^in. long, yellow ; generally re- 

 sembling the pupa, but thinner, and capable of moving. Legs 

 short, w^eak, and slender. Antennae very slender, and appa- 

 rently of four joints (or six?). 



Eggs oval. I cannot detect any peduncle, although this 

 seems to be usual in the genus. 



Hab. In Fiji, on sugar-cane, and rarely also on stems of 

 grass. Mr. K. L. Holmes, of Bua, has been kind enough to 

 send me a number of specimens. 



Signoret describes (" Monographic," pp. 395-399) three 

 species having large brown patches on theforewings — A. hcrgii, 

 Sign., .4. abatilonea, Haldeman, iindA.2:>hal(znoides, Blanchard. 

 The original description of this last, a Chilian insect living on 

 Cestrum parqui, is too vague and brief for comparison, the 

 pupa not being mentioned. Haldeman's species, on Ahutilon, 

 in Penns}lvania, has a circular dark patch at the tip of thefore- 

 wing. The other, A. hcrgii, lives on sugar-cane in Mauritius, 

 and seems to be closely allied to the Fijian species. Signoret 

 had only seen the male insect, and this agrees with ours in 

 the shortness of the wings, in the joints of the antennae, and 

 in one or two other particulars. At the same time, there are 

 important differences. The wings of A. bergii are stated to 

 be narrow, which those of A. sacchari are not, and to have 

 their surface covered with " blackish spots, of which some are 



