LIST OF DIPTEEA. 339 



Genus 7. THYLLIS. 



Oculi pubescentes, super et sub antennamm basi contigui. 

 Ocelli tres. Proboscis longa. AntenuiB biarticulatae, fronts insertae. 

 Protboracis lobi dorsales contig-ui. 



Thyllis, Erichs. Entomogr. i. 149. 

 Acroceva, p., Fabr. 

 Cyrtus, p., Wied. 



Subcostal vein ending at much beyond half the length of the 

 wing; mediastinal ending at about three-fourths of the length; 

 radial ending at about five-sixths of the length ; first branch of the 

 cubital obsolete ; second ending at a little behind the tip of the 

 wing ; first and second externo-medial veins complete ; third abbre- 

 viated ; subanal and anal veins united near the border, to which 

 they do not extend ; discal areolet elongated, subtetragonal. 



1. Thyllis chassus. 



Nigra, rufovaria; protkoracis margo aniicus, mesothoracis vitta 

 lateralis Jlexuosa, ahdominisque fascia: interrupts Jlava ; al<B 

 ad costam fuscce. 



Acrocera crassa, Fabr. Syst. Anil. 332, 2. 

 Cyrtus crassus, Wied. Auss. Zweiji. ii. 15, 4. 

 Thyllis crassa, Erichs. Entomogr. i. 150, 1. 



Cape. 



2. Thyllis xurgioa. 



Nigra, rufo varia ; prothoracis margo anticus et posticus, mesotho- 

 racisque vitta lateralis Jlava ; ala fusco hyalina, ad costam 

 fuscce. 



Thyllis turgida, Erichs. Entomogr. i. 150, 2. 



Cape. 



3. Thyllis odesa. 



Nigra ; prothoracis margo anticus el posticus, mesothoracis vittcB 2 

 marginaln , scuiellum et segmentorum abdominaiium margines 

 postici Jlava ; alee hyalince, ad costam fuscce. 



Thyllis obesa, Erichs. Entomogr. i. 151, 3. 



Cape. 



