MICROLEPIDOPTERA OF JUAN FERNANDEZ ISLANDS — CLARKE 59 



fuscous subterminal band preceded on costa by a cream-buff spot. 

 Hindwing drab crossed by four indistinct, suffused, fuscous bands, 

 alternating with cream buff, in dorsal half of wing, the outer band 

 represented by a conspicuous fuscous blotch; cUia cream buff with 

 conspicuous fuscous basal band at apex and along termen; underside 

 with three well-defined grayish-fuscous bands. Legs grayish fuscous 

 except buff outer side of first femur and narrow, suffused, annulations 

 on all tarsi. Abdomen fuscous with narrow, pale, grayish annula- 

 tions; first three or four segments white beneath; on third segment, 

 dorsally a conspicuous buff spot; anal tuft buff. 



Male genitalia (slides 10245, 10363): Harpe simple, narrow at 

 base and widened toward cucullus. Uncus as long as gnathos, di- 

 lated toward apex and sharply pointed; gnathos slender, slightly 

 curved and armed with a series of sawlike teeth on posterior edge. 

 Anellus an elongate sclerotized plate, slightly convex ventrally. 

 Aedeagus short, stout, armed with two strong hooks. Vinculum a 

 narrow band. 



Female genitalia (slides 10249, 10364) : Ostium moderately broad, 

 posterior edge concave. Ductus bursae membranous except for a 

 short distance before ostium. Inception of ductus seminaUs at 

 junction of membranous and sclerotized parts of ductus bursae. 

 Bursa copulatrix, pear shaped, broader posteriorly than anteriorly; 

 signum a four-pointed, scobinate plate (in one example the ventral 

 point, nearest observer, is produced more than a third the length of 

 bursa copulatrix). 



Type: Masafuera: Inocentes Bajos, 1000 m. (Jan. 27, 1952). 



Food plant: Diksonia berteriana (Colla) Hooker. 



Described from the type male and 30 cf cf and 6 99 paratypes as 

 follows: Masafuera: La Correspondencia, 1300 m., 2 cfcf (Jan. 21, 

 1952); Inocentes Bajos, 1000 m., 13 cTcf^ (Jan. 27, 1952); Quebrada 

 de la Calavera, 350 m., 8 cfd' (Jan. 15, 1952, Jan. 23, 1955); Que- 

 brada de las Casas, cf, 9 (Jan. 19, 1952); Quebrada de las Vacas, c?" 

 (Jan. 17, 1952). Masatierra: Bahia Cumberland, 5 cTd^, 5 99 (Feb. 

 15-Mar. 4, 1951, Mar. 18, 1955). 



As indicated elsewhere in this paper, there are very few of the 

 species that are represented on more than one of the islands of this 

 group. In the case of crena, however, there can be no doubt about the 

 identity of the populations found on Masatierra and Masafuera. 

 The examples from Masafuera all, apparently, from relatively high 

 altitudes, show a constancy of coloration not found in the Masatierra 

 specimens. The latter, all from the one locality at low altitude, 

 exhibit considerable variation among themselves and aU are different 

 from the Masafuera group. In addition to the brown spots indicated 

 in the description, there is a spot of similar color at the end of cell of 



