DIPTERA. 267 



ACANTHOMERID.E. 

 ACANTHOMERA (p. 67). 



Acanthomera ? (p. 68). 



To the locality given, add : — Mexico, Cuesta de Misantla (M. Trujillo). 



Three specimens, evidently of the same species as that noticed by Osten Sacken, 

 though I should not have described the antennae as "disciform," but rather as 

 flattened-subulate or fusiform. The examples are all males, so that I cannot solve 

 the doubt expressed by him as to the identity of the insect. 



MYDAIMJ (p. 68). 

 LEPTOMIDAS (p. 68). 

 Leptomidas brachyrhynchus (p. 69). 



To the locality given, add : — Mexico, Teapa in Tabasco (//. II. Smith). 



A single male specimen, somewhat doubtfully referred to the present species. It is 

 black throughout, the abdomen shining, with the cross-bands distinct. The legs are 

 brown ; the hind pair black, with the basal half of the tibiae and femora light yellow. 

 The humeri are yellow. The wings are nearly hyaline. The species must be closely 

 allied to, if not identical with, L. tenuipes, Loew. 



MYDAS * (p. 70). 

 Mydas, Osten Sacken, Berl. ent. Zeitschr. xl. p. 345 (1895). 

 Midas, antea, p. 70. 



Mydas rubidapex (p. 70). 



Mydas rubidapex, Brauer, Sitzungsb. der Akad. Wissensch. 1883, p. 151, tab. fig. 2 1 ; Willist. 

 Trans. Kans. Acad. Sci. xiv. p. 55 2 . 

 To the localities given, add :— Mexico 2 , Venta de Zopilote, Dos Arroyos, and 

 Acaguizotla in Guerrero (H. H. Smith), Yucatan (Gaunter). 



Three specimens. One, a female, has the antennae black, with the bulbous portion 

 of the lamella yellow, and the anal angle of the wings largely whitish. The others, 

 male and female, have the first two joints only of the antennae black, and neither has 

 any whitish colour in the anal angle. In all of them the abdomen is deep black, 

 without distinct violet or blue lustre. A single example from Yucatan has the alulae 

 black and the abdomen deep violet. I am unable to see any other differences. 



* [Prof. Williston prefers to use the original name, Mydas, for this genus, instead of the amended form, 

 Midas, adopted in the earlier portion of this volume.— Ed.] 



2ro2 



