560 LIST OF DIPTERA. 



B. Corpus scoriaceo nigrum. - robusta, Wied. 



C. Abdomen testaceum. ----- bicolor, Wied. 



D. Thorax apice et abdomen basi flava. nigripennis, Wied. 



B. Alae fuscescentes. ------ bicolor, Macq. 



C. Alae subfuscae, postice sublimpidae. - - Tidius, Walk. 



D. Ala? medio iuscanae. ... - leucospila, Wied. 



E. Aloe rlavae, macula violacea. ... notabilis, Macq. 



F. Alae flavse, apice fuscae. - - - - flavipennis, Macq. 



G. Alae flavescentes. 



A. Pedes nigri. 



a. Abdomen tolum nigrum. - senopeza, Macq. 



B. Abdomen apice testaceum. - - - gracilis, Macq. 



B. Pedes rubidi. ----- xanthoptera, Wied. 

 H. Alae apud apices flavidee. - hirsuta, Wied. 



I. Alae cinereae. - picipes, Walk. 



J. Alae limpidas, apice fuscanae. - - chrysocosmia, Jf'ied. 

 K. Alae albae. ------- Alebas, Walk. 



Group 1. 



Corpus latissitnum, densissime pilosum, non setosum. Facies 

 convexa, densissime hirta. Proboscis latissima, recta, linearis. 

 Antennarum articulus 3us subfusiformis, lo et 2o conjunctim multo 

 longior. Pedes robusti, valde pilosi ; femora crassa. 



Body very broad, very thickly clothed with short hairs, not 

 setose. Face convex, thickly covered with hairs, which form the 

 mystax. Proboscis linear, straight, very broad. Third joint of the 

 antennae very much longer than the first and the second together, 

 slightly increasing in breadth from the base to three-fourths of the 

 length, whence it tapers to the tip. Legs hairy, very stout; femora 

 thick. Fore fork of the cubital vein very slightly undulating; hind 

 fork and first externo-medial vein nearly straight, parallel to each 

 other; second externo-medial straight; third forming a slightly 

 obtuse aufjle with the praebrachial, joining the fourth far from the 

 border. Subanal joining the anal at some distance from the border. 



Laphria Tidius, Walk. 



Group 2. 



Laphria tergiss<e structura. 



Structure of L. tergissa and of the other species in the second 

 American group. 



Laphria Alebas, Walk. 



