Journal New York Entomologigal Society. [Voi vi. 
DIPTERA FROM THE LOWER RIO GRANDE OR 
TAMAULIPAN FAUNA OF TEXAS—II.* 
By C. H. Tyler Townsend. 
TABANID M. \ 
Tabanus atratus F. 
Two $ $ . April 16, and July n. Brownsville, Texas. 
The eyes are slightly pubescent. First posterior cell completely 
closed, very short petiolate. Length, 20 to 22 mm. 
SYRPHIDyE. 
Eupeodes volucris O. S. 
One 9 . May 2. Brownsville, Texas. Taken on foliage. 
Length, 7 mm. Has ground color of abdomen brown, instead of 
black. & This record extends the range of this species very considerably 
It is a characteristic species of the Plains, belonging distinctively to the 
Upper Sonoran subregion, and is one of those species which indicate 
the extension of the dilute Upper Sonoran to the Lower Rio Grande 
region. There is a certain element of Upper Sonoran present in the 
Tamaulipan fauna; and it is interesting to reflect that the dilute Upper 
Sonoran reaches to, and actually meets and mixes with the dilute Neo¬ 
tropical here on the Lower Rio Grande. 
Baccha tropical is Towns. 
This species was described in Section I. It is most nearly allied to 
B. notaia Loew of Cuba, a specimen of which from Florida has recently 
been identified by Mr. W. D. Hunter (with Dr. Williston’s assistance). 
The Florida specimen, while stated to be a $ (Can. Ent. April, 1896, 
p. 97), possesses the peculiarities of wing coloration and abdominal 
markings distinctive of the 9 of tropicalis. If it be a $ , it is certainly: 
a most aberrant one, judging from the usual sexual characters in this 
Neotropical group of Baccha . 
Note.— While referring here to Mr. Hunter’s papers, I wish to 
point out a few errors that he has made. In the Can. Ent. for April, 
1896, p. 96, he states that up to that time there had been recorded only 
one specimen of Baccha tarchetius Walker, besides the type in the 
British Museum; and that that specimen was from New Jersey, col¬ 
lected by Mr. Keeti, and is now in the National Museum. If he will 
refer to the Trans. Am. Ent. Soc. for March, 1895, p. 38, he will find 
* Section I of this paper appeared in Journ. N. Y. Ent. Soc. 1897. 
