LIST OF DIPTERA. 293 



72. Cheysops crudelis. 



Niger ; thoracis later a Jlava ; abdominis later a basifiava ; alee 

 hyaUna, costa fascia apiceque nigris. 



Chrysops crudelis, Wied. Auss. Zweifl. i. 195, 2. 



73. Chrysops geminatus. 



Nigellus ; antenna fusca, basi jlava ; thorax vittis duabus flavi- 

 dis ; abdomen jlavum, maculis duabus obliquis baseos et 

 utrinque binis conjunctis segmentorum sequentium nigris ; 

 pedes flavin fusco varii ; ala limpida, costa fascia apiceque 

 fuscis, 



Chrysops geminatus, Wied. 



Genus 15. GASTROXIDES. 



Corpus mediocre, pubescens, oblongum, sat latum. Proboscis 

 brevis. Antennae 7-articulatae, cylindrical ; articuli lus et 2us hirti, 

 aequales. Abdomen depressura, fceniinsB apice compressum. 



Gastroxides, Saunders. 



Mediastinal vein ending at much before two-thirds of the 

 length of the wing. Subcostal ending at before three-fourths of the 

 length. Radial ending at nearer the tip of the wing than to the 

 subcostal. First branch of the cubital simple, very slightly curved, 

 forming a very obtuse and rounded angle near its base ; second 

 branch nearly straight, ending on the hind border far from the tip 

 of the wing. Four complete separate externo-medial veins. Sub- 

 anal vein united to the anal on the border. Discal areolet elongated, 

 hexagonal ; fore and hind sides parallel. 



1. Gastroxides ater. 



Atra ; abdomen maris fulvo late fas datum ; ales nigro-fusca?, 

 fasciis duabus abbreviatis albis, margine postico cinereo. 



Gastroxides ater, Saunders. 



a. From Mr. Saunders' collection. 



2 C 3 



