A New Endemic Genus of Lepidoptera.
[Read before the Nelson Philosophical Society, 11th June, 1924, received by Editor, 16th June, 1924; issued separately, 31st March, 1926.]
It has become necessary to create a new genus for Trachypepla lathriopa Meyrick (Trans. Ent. Soc. Lond., 1905, p. 237). While studying the genus Borkhausenia the writer had occasion to examine the species in question closely, and, without knowing its identity with lathriopa, discovered that it possessed characters which would not allow of its being placed in any known New Zealand genus. A specimen was submitted to Mr. Meyrick, who pronounced it to be his lathriopa, but agreed that it must be removed to a new genus, pointing out that its nearest affinities were with Chersadaula Meyr., from which it differed only in the presence of scale-tufts on the forewings, and the fully-winged female.
The writer proposes the name Euchersadaula for the genus, and gives below a synopsis of the characters, with some structural figures.
Euchersadaula n. g.
Head smooth, loosely haired behind; tongue developed. Antennae ¾, in male with short even ciliations, basal segment moderate, without pecten. Labial palpi rather long, recurved, second segment thickened, with appressed scales, terminal segment half as long as second, slender, acute. Maxillary palpi minute, four-jointed. Thorax smooth. Posterior tibiae rather long-haired above. Forewings with slightly-raised tufts of scales, 1A and 2A coalescing at about ⅓, Cu1a and Cu1b short-stalked, from angle, R4 and R5 stalked, R5 to costa, rf at about ½. Hindwings 1, fringes ¾, Cu1a and M3 connate, M1 somewhat sinuate.
Euchersadaula lathriopa (Meyr.). A, venation of forewing; B, venation of hindwing; C, head, lateral view.
Genotype: Trachypepla lathriopa Meyr.