122

Mr. R. M‘Lachlan’s Monograph of the

white markings, viz., a broad band at the extreme base, reachingnearly across the wing ; a narrower band before the middle, alsoreaching nearly across the w’ing ; two large triangular oppositespots, one on the costa and one on the dorsal margin, a littlebeyond the middle; and about eight small spots round the apicalmargin ; neuration indistinct, the three transverse veins formingthe anastomosis placed in an oblique interrupted line. Posteriorwings grey, with grey fringes. Legs somewhat fuscescent, witha silvery lustre. Abdomen black with pale lateral lines. In themale there are two long needle-shaped and curved app. intermed.,the left hand one being nearly twice the length of the right(I have examined five males, and in every one I find that theapp. intermed. are thus unequal ; this in a single specimen Ishould have considered accidental); between these app. intermed.is an enormously long and slender needle-shaped upper penis-cover; app. inf. very long and slender, hairy, the points turnedupwards. In the female there are two slender superior valves,and two broad and obtuse lateral valves.

Expanse of fore-wings 6^ — 7| lines.

This elegant species was described by Fabricius from an English specimen in 1775, but was not re-discovered in this country untilthe year 1859, when a single example was taken at the canal atTaunton by Mr. Parfitt, the only native specimen that I have seen.I possess a fine series of the insect from Prussia.

The name interrupts was erroneously applied by Donovan andStephens to Leptocerus albifrons, Linn.

Fam. IdYDrvOPSYCHIDTE.

Antennae fine with long joints and longer than the wings, orstouter with short joints and shorter than the wings; ocelligenerally absent; maxillary palpi alike in both sexes, long,scarcely hairy, the terminal joint longer than the others, flexibleand multiarticulate, or appearing to be made up of a number ofvery small joints, the sutures of which are readily seen in somegenera, but are indistinct in others; labial palpi also with theterminal joint multiarticulate ; anterior wings generally dilatedtowards the apex, usually thinly clothed with hair, but sometimeswith long and thick hair ; discoidal cell closed ; posterior wingsfolded, usually shorter and broader than the anterior; legs spine-less, with the spurs variable in number, the posterior tibiae always(in British genera) with two pairs of spurs.

Larvae elongate, tapering at the extremities, especially pos-