TABANID^ OF OHIO. 43 



Male : First basal cell with a hyaline patch before the apex ; second 

 :basal cell with a long hyaline streak through its center; this streak is 

 •expanded near the apex of» the cell and communicates with the hyaline 

 patch in the first basal ; the veins which bound the anal cell are margined 

 "with brown ; the yellow on the sides of the first two abdominal segments 

 :is less extensive than in the female and the yellow triangles are smaller. 



Habitat : Sandusky, Ohio. 



The width of the apical spot easily separates this species from 

 '.moerens, calUdiis and indiis. It is related to pudiciis, but is more 

 robust, the black on the second segment is more extensive and 

 the cross-band different than in that species. Osten Sacken prob- 

 .ably included it with pndicus. See his observation appended to 

 '.that species. 



It appears to be a common species on Cedar Point during the 

 first half of June, and the females were very persistent in attack- 

 ing us while we were collecting the specimens we procured. 



CHRYSOPS STRiATus Ostcn Sackcn 



Length 7-9 mm. The two longitudinal stripes on the middle of the 

 thorax are "greenish-gray" and therefore quite different from those of 

 vittatus; abdomen, dorsally marked with four longitudinal stripes, the 

 -two inner of which usually reach the scutellum and join- one another on 

 the first segment and in now and then a specimen they also unite on the 

 anterior part of the second segment ; the outer stripes may or may not 

 reach forward onto the first segment ; ventrally yellow on basal half, 

 marked with black on middle and sides on apical half. 



Female : Frontal callosity varying from light brown to pure black ; 

 scutellum black on the disk, margined with yellow; first basal cell of 

 wing brown, second hyaline except a small patch at base; the cross band 

 leaves a very narrow margin at the apex of the fourth submarginal cell ; 

 posterior branch of the fifth vein dimly margined on both sides, otherwise 

 the fifth posterior and apical cells are hyaline ; the hyaline triangle occu- 

 pies the apical parts of the first three posterior cells and extends into 

 both submarginal cells in the region of the branching of the third vein ; 

 the second submarginal is almost entirely brown in some specimens or 

 in others may be hyaline along the whole length of the posterior branch 

 'of the third vein to the extent of half the cell. 



Male: Scutellum usually entirely black; a subhyaline streak passes 

 from the margin of the wing lengthwise of the fifth posterior cell into 

 the second basal and toward the base of the wing along the fourth vein ; 

 otherwise the second basal and fifth posterior cells infuscated, first basal 

 Thrown with the exception of a small hyaline spot ; apical spot includes 

 nearly all of the second submarginal and may encroach upon the first 

 posterior cell. The male is here described for the first time. 



Habitat : Sandusky, Ohio, where it is fairly common. 



This species is variable and hard to define ; the variations 

 extend to characters which in other species are known to be 

 constant, and in some instances suggest a. close relationship with 

 sequax, whose type locality is Western Kansas. 



