Paragus. 45 



VI. Microdontinae. 



Antennæ elongate, porrected, basal joints long; arista dorsal, bare. 

 Epistoma rather broad, evenly arched, without central knob, not 

 descending; it is æneous, densely hairy. Eyes separated in both sexes. 

 Subcostal cell open; medial cross-vein well before the middle of the 

 discai cell; cubital vein nearly straight, but with a curious veinlet 

 stretching down in the middle of the first posterior cell; upper marginal 

 cross-vein recurrent; a stigmatical cross-vein present. 



The larvæ are curious, slug-like; they live in nests of ants, 



Only one genus 49. Microdon. j i'^ 



VII. Ceriinae. 



Antennæ elongate, porrected, sometimes placed on a long, styli- 

 form process, third joint with a terminal style. Epistoma almost not 

 hollowed, with a slight central knob belovv, considerably descending; 

 it is yellow with black middle stripe, bare. Eyes touching in the male. 

 Subcostal cell open; medial cross-vein after the middle of the discai 

 cell; cubital vein curved more or less downwards in the first posterior 

 cell, and the loop angular with a veinlet issuing downwards from it; 

 an indistinct stigmatical cross-vein, 



The larvæ hve in ulcerated trees; the pupa has no anterior 

 spiracular tubes. 



Only one genus 50. Cerioides. ^ O t> 



I. Syrphinae. 



1. Paragus Latr. 



Medium sized or small species, of black colour or with abdomen 

 more or less marked with red. Head about semiglobular, as broad 

 as thorax, or a little broader, hollowed behind. Eyes touching in the 

 male for a short distance, more or less broadly separated in the 

 female; they are short-hairy, sometimes the hairs forming more or 

 less distinct bands; in the male the facets are a little enlarged at the 

 upper corner towards the suture. Antennæ inserted near each other, 

 above the middle; they are more or less elongate, with the third joint 

 somewhat linear, twice to several times longer than broad; arista 



