MICROLEPIDOPTERA OF NEW GUINEA 
37 
eastcoast of Sumatra at an elevation of 800 meters and also from the 
K hasi Hills in Assam. 
Summing up these not all too extensive data we come to the following 
conclusion. The tribe Zacoriscini, however typical for the Papuan region 
at the present time, is evidently of South Asiatic origin and has arrived 
in some remote period — e.g., pleistocene — through the Sun da shelf. 
The scattered sparse remnants of this invasion maintain themselves in the 
West of the Archipelago, in the mountains, their usual habitat (Z. toxopei 
aplasta Diakonoff in Kinabalu; Z. taminia in Mount Cede and neigh- 
bouring mountains of West Java, together with Isotenes inae and I. thau- 
masia Diakonoff). Very remarkable is the behaviour of Z. toxopei, the 
nominate form of which hies in Central New Guinea, while a considerably 
modified subspecies found refuge in the remote Kinabalu. 
The Zacoi’iscine invasion apparently found optimal conditions in New 
Guinea, where both Zacorisca and Isotenes either came to a rich develop- 
ment afterwards or — which seems less probable — could maintain 
themselves from the time of their arrival up to now. The isolation of the 
Snow Mountains promoted arising of endemic genera, Chionothremma and 
Diphtheropyga, which indicates considerable antiquity of our South 
Asiatic invasion. Chionothremma came to an extremely rich development 
there. 
In other words, how rich and typical for the present Papuan fauna this 
tribe may be, the widely scattered sparse stragglers belonging to this group 
indicate, if not an exogenic then at least a diendogenic character of the 
Zacoriscine fauna of New Guinea. 
Zacorisca Meyrick, 1910 (figs. 13, 14, 16, 17, 24) 
Zacorisca Meyrick, 1910, Proc. Linn. Soc. N.S. Wales, vol. 35, p. 220. Exot. 
Microl., vol. 3, p. Ill, 1924. Fletcher, Mem. Agr. Ind., Entom., vol. 11, p. 238, 
1929. Diakonoff, Treubia, vol. 18, p. 31. 1941; ibidem, vol. hors s6rie, p. 34 — 36, 
1944 (genotype: holantha Meyrick, 1910). 
Atteria Meyrick, 1910 (nee Walker), Proc. Linn. Soc. N.S. Wales, vol. 35, p. 221. 
Megalodoris Meyrick, 1912, Exot. Microl., vol. 1, p. 5; ibidem , vol. 3, p. Ill, 
1924 (genotype stephanitis Meyrick 1910). Fletcher, Mem. Dept. Agr. Ind., 
Entom., vol. 11, p. 135, 1929. 
Chresmarcha, Diakonoff (nee Meyrick), Zool. Meded. Mns. Leiden, vol. 21, p. 
135-142, 1939. 
The definition of the present genus has given us considerable trouble 
before, and we were obliged to revise our opinion once (cf. below sub 
Chresmarcha). This genus may be defined once more as follows. 
Head smoothly scaled, ocelli present, posterior. Proboscis developed. 
Palpus moderate or rather long, subascending or almost porrect, smooth, 
or with some roughish scales tow r ards apex above, seldom with short 
roughly projecting scales above, and towards apex beneath (Z. tetrachrorna 
Diakonoff), median segment S-shaped, more so in female, terminal 
segment moderate, subobtuse, in female drooping. Antenna moderately 
