78 AMERICAN DIPT ERA. 



Loew to include forms with woolly liair and curved apical spurs on 

 the middle tibiae, we consider not sufficiently distinct, and allow it 

 to lapse as a synonym, in part, of Leria. The characters apply 

 mostly to the males, only with difficulty to the females, and there 

 are intermediate forms. Loew himself states that Leria iners has 

 curved spurs, and in Centuries, iii, 51 he mentions his own Leria 

 spectahilis as a Scoliocentra. 



Among other generic characters, the eyes are generally round, the 

 antennae short, with a round third joint, arista bare, either long or 

 short; one humeral bristle; one propleural ; two small prescutellar ; 

 scutellar bare, with the usual two pairs of bristles. 



Leria specus Aldrich is a synonym of CEcothea fenestraiis, as we 

 find from an explanation of cotypes. 



Leria carolinensis Desv. is insufficiently described, and we fail to 

 identify it, but give a translation of the original description. 



Leria tibialis, geniculata and humeralis, all described originally 

 by Zetterstedt in northern Europe, are reported from Greenland by 

 Luudbeck and part by earlier entomologists. The species, how- 

 ever, seem to be badly confused, as in Katalog der Paliiarktischen 

 Diptereu, iv, 47, 48, Becker disposes of them as follows: tibialis he 

 makes a synonym of serrata, humeralis of inscripta Meig. (Euro- 

 pean), while geniculata is in part a synonym of serrata, and in part 

 of inscripta Meig., another European species. This tangle should 

 evidently be unraveled by European entomologists; for the present 

 it is hardly worth while for us to quote the descriptions, as they all 

 read much alike. 



The remaining Lerias of the 1905 Catalogue are included in the 

 following table, with the addition of helvola and fraterna, formerly 

 referred to Scoliocentra, and of glauca new species, and crassipes, 

 described as European. Specimens of all the species tabulated have 

 been examined by us except tristis and Intea ; of these we translate 

 the original descriptions. 



TABLE OF SPECIES. 



1. Mesopleura liairy at least on tlie lower and hind part 2. 



Mesopleuia haie, at most with a few Lairs close to the jiropleuial bristle. • • -4. 



2. Mesopleura entirely hairy in the male, in the female tlie upper hind corner 



bare fraternst Loew. 



Mesopleura hairy only on the lower and hind part 3. 



.3. Abdomen black, hind margins of the segments reddish. . piibeNCCiiM Loew. 

 Abdomen black, not banded delej^sa Osten Sacken. 



