TABANID^< OF OHIO. 45 



The most abundant and widespread species in this section. 

 The females are troublesome to stock, and are commonly ob- 

 served on horses and cattle with their abdomens filled with blood. 

 The males have been procured along the margin of ponds and on 

 various kinds of flowers. 



PANGONIA Latreille. 

 Hist. Nat. des Crust, et des Ins. Ill, 1302. 

 Only a single species of this genus has been taken in Ohio 

 up to the present time. Two others have a range such that they 

 may be considered as probably belonging to our fauna. These 

 three are considered in the key below. The males and females 

 are so much alike that a single key will serve for both sexes. 



Key to the species. 



1. Antennae dark 2. 

 Antennae light reddish or yellow pigra. 



2. Hind borders of the abdominal segments with gray hairs rasa. 

 Hind borders of the abdominal segments with golden-j^ellow 



hairs tranquilla. 



PANGONIA RASA LoCW. 



Length 11-13 mm. A brownish species .with the hind margins of 

 the abdominal segments white; femora light brown, tibiae and tarsi 

 darker; first two segments of the antennae brown with black hairs, third 

 .segment nearly black; wings pure hyaline with brown stigma. 



Female : Thorax distinctly gray with three darker longitudinal 

 vittae ; abdominal segments with distinct gray margins which in some 

 cases expand into median triangles, most distinct on the second segment; 

 proboscis slightly longer than the height of the head nearly black in color, 

 -maxillary palps yellowish, the terminal segment pointing downward and 

 slightly forward, half as long as the proboscis. 



Male: General color darker than in the female, the posterior 

 margins of the abdominal segments narrower and consequently less prom- 

 inent than in the female and with no trace of a median triangle on any of 

 the segments; proboscis about ' as long as the height of the head, palpi 

 ■darker than in the female with the terminal segment pointing almost 

 ■directly forward. 



Habitat : Northern and Southern Ohio. 

 I have taken both male and female on flowers, but have never 

 observed the female around stock. 



coNiops Aldrich. 

 Psyche VI, 236, 1892. 

 There is only one species in this genus. So far as our species 

 of this group are concerned, the genus appears to be sufficiently 

 •characterized, but a full knowledge of Central and South Amerir 

 ■can forms is necessary before conclusive results can be reached in 

 the sub-family. ; 



