84 



DIPTEEA. 



Hab. United States, New Mexico (coll. WiMt8k) ; --Mm.tGO \ Tepetlapa in Guerrero 

 3000 feet (H. H, Smith). 



A single specimen from Tepetlapa, agreeing well with Bigot's description l . 

 P. ochreiceps is nearest allied to P. texana, Willist., differing chiefly in the presence of 

 the lateral thoracic stripes. It is not at all improbable that the names may prove to 

 be synonymous. 



TROPIDOMYIA. 



Tropidomyia, Williston, Canad. Entom. xx. p. 11 (1888). 



1. Tropidomyia bimaculata. 



Tropidomyia bimaculata, Willist. Canad. Entom. xx. p. 11 \ 



Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith).— South Ameeica, 

 Brazil \ 



A single male specimen from Xucumanatlan, agreeing well with the types and with 

 the description. 



ZODION. 



Zodion, Latreille, Precis des caract. gen. des Ins. (1796). 



1. Zodion pygmseum. 



Zodion pygmaum, Willist. Trans. Conn. Acad. vi. pp. 381, 392 \ 



Hab. United States, California \ Colorado l . — Mexico, Xucumanatlan 7000 feet, 

 Omilteme 8000 feet, both in Guerrero, Atoyac in Vera Cruz (H. H. Smith), Orizaba 

 (H. H. Smith & F. D. Godman). 



Six specimens, agreeing well with the types. 



2. Zodion ? 



Hab. Mexico, Xucumanatlan in Guerrero 7000 feet, Atoyac in Vera Cruz (H. H. 

 Smith). 



A number of specimens from the above-named localities evidently represent a distinct, 

 hitherto unnamed, species. It is closely allied, however, to Z. pygmwwm, Willist., 

 difFering chiefly in the larger size (5-6 millim.). The thorax has, usually, six velvety- 

 black stripes. The abdomen varies not a little in the markings, the three or fourpairs 

 of velvety-black triangles often coalescing to form single triangles, especially on the 

 third segment. 



3. Zodion fulvifrons. 



Zodion fulvifrons, Say, Journ. Acad. Phil. iii. p. 83 (1823) 1 ; Complete Writings, ii. p. 74 3 ; 

 Wiedem. Aussereur. zweifl. Ins. ii. p. 241 3 ; Willist. Trans. Conn. Acad. vi. pp. 380, 392*. 



