Micro-Lepido'ptera from Bolivia and Peru. 17 



ternien : cilia whitish sprinkled with grey, on basal half more or less 

 barred with grey. Hind-wings very pale shining greyish-ochreous, 

 more whitish-ochreous towards base, greyer towards apex : cilia 

 whitish, with one or two ochreous-grey shades. 



Peru, Aqualani; ten specimens. This large and ele- 

 gantly coloured species is very variable ; it is allied to 

 chiriquitana, Z. I follow Prof". Fernald in resuming the 

 use of the generic name Peronea, Curt., to supersede 

 Acalla, Oxygro.pha, and Teras. 



COSMOPTERYGIDAE. 



I have come to the conclusion that the family Elaclvis- 

 tidac as formerly understood by myself is heterogeneous, 

 and includes forms of various origin. I use the family 

 name Gosnioptcrygidao to include those genera with long 

 sickle-shaped palpi, fore-wings with veins 7 and 8 stalked, 

 7 to costa, hind-wings lanceolate or linear, with veins 2-5 

 separate, nearly pai'allel, 3 from before angle of cell, 6 and 

 7 more or less approximated towards base. Characteristic 

 genera of this family are Cosmoptcryx., Stagmatophora, 

 Limnoccia, and Mompha ; but ElacMsta itself does not 

 belong here. I regard the family as a development of 

 the Oecophoridae, and believe I have a complete series of 

 transitional forms. 



Zaratlia mcsonydia, n. sp. 



^ 9 . 17-19 mm. Head purple-grey, sides of crown pale yellowish. 

 Palpi ochreous-yellow, second joint suffused with fuscous anteriorly 

 except at apex, anterior edge of terminal joint dark fuscous. 

 Antennae dark grey, with a white subapical band, anteriorly with a 

 suffused ochreous-yellow streak towards base. Thorax dark purplish- 

 fuscous, with a yellowish line on each sitk of back. Abdomen dark 

 purplish-fuscous, beneath in ^ ochreous-yellowish banded with 

 white, in 9 ochreous-white. Legs dark purplish-fuscous, beneath 

 streaked with ochreous-yellow and white, anterior and middle tibiae 

 banded with yellow, anterior tarsi with joints 3, 4 white, middle 

 tarsi with joints 3-5 white, posterior tarsi with first joint suffused 

 with yellowish towards base, joints 3-5 wholly white. Fore-wings 

 extremely narrow, parallel-sided, short-pointed, apex round-pointed ; 

 dark purplish-fuscous, apical third lighter, central third suffused 

 with blackish except towards costa ; a lighter fuscous patch extending 

 over dorsal half of basal third, marked above with a pale yellowish 



TRANS. ENT. SOC. LOXD. 1909. — PART I. (mAY) C 



