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Z. SZILÁDY 
1° Frons parallel shaped, lower callus round, brown, the upper 
one squarish, black, a connecting line between them is absent. 
2° Legs almost entirely yellow. 
3° The dark colouring on the abdomen is less extended. 
The Formosa specimen approaches, on the contrary, 0. miser. 
Silviochrysops n. g. 
Type: Silviochrysops flavescens n. sp. 
Frontal callus oval, transversal, frons squarish. Basal joints of 
antennae short, their length not attaining the double of their thickness; 
second joint considerably shorter than the first. Wings with dark pattern 
like in Chrysops. This genus unites the characters of Chrysops with 
those of Silvius. 
Silviochrysops flavescens n. sp. 
(f unknown, $ 8*5—9*5 mm. Body buff coloured, only the eyes 
being of a deep green with obliterate purple spots. 
Head and facial calli ochraceous ; lower lateral and oral callus 
wanting, the others confluent. Pubescence of head almost entively yellow. 
Ocelli black. Frans squarish, its outlines slightly converging above. 
Antennae and palpi yellow. Third joint of the former reddish, style 
blackish, basal joints black-haired. 
Thorax greenish yellow, with 3 dorsal stripes, the median one of 
which is narrower, dark brown, sharply separated, reaching the praescu- 
tellum. Pattern of wings brown, pterostigma yellow. Transparent parts, 
especially in the basal cells, whitish. The dark premarginal spot reaches 
the tip of the wing and also extends, in the form of two processes, upon 
the basal part of both basal cells. Middle band with uneven outlines, 
extending to the hind margin of the wings, but only confined to the 
narrowly opened anal cell. It is interrupted in the 4 th and 5 th hind 
marginal cell by a wide light marginal spot and forms, in the discal cell 
and in the basal part of the submarginal cell, a windowlike interruption. 
Abdomen buff coloured with two rows of obliterate brown discal 
spots. 
Types from Tainan and Anping. 
Neochrysops n. g. 
Type: Neochrysops grandis n. sp. 
The species belonging to this genus differs from the genus Chrysops 
in the following characters : 
