43Q INSECTS INJURIOUS TO VEGETATION. 



means whereof an entomologist would find little or no difficulty 

 in recognizing them; namely, hcemorrhoidalis, the red-tailed, 

 maiirus, the dark-colored, and affinis, the allied, so called from 

 its near resemblance to the preceding species. These singular 

 insects were taken upon a willow-tree, by my friend, the Rev. 

 L. W. Leonard, and were presented to me many years ago. 



The red-tailed Oryssus has been renamed and described, by 

 Mr. Newman, in the October number of the fifth volume* of 

 " The Entomological Magazine," published in London in 1838. 

 It is his Oryssus terminalis. The female only is known to me. 

 Her body is black, rough before, and smooth behind, with the 

 last three segments of a blood-red color. The outer side of 

 the fourth and fifth joints of her antennre, her knees, and a 

 line on the outer edge of her shins, are white. Her feet are 

 dull red. Her wings are clear and transparent, with a broad, 

 smoky brown, transverse band, beyond the middle of the first 

 pair. Her body measures nearly six tenths of an inch in length. 



The dark-colored Oryssus is probably the same as one de- 

 scribed by Mr. Westwood, in 1835, in the fifth volume f of 

 " The Zoological Journal," under the name of Ori/ssus Sayii, 

 in honor of the late Mr. Say, who sent him the insect. It is 

 of a deep black color, rough before and smooth behind, and is 

 marked with white on the antennae and legs, like the red-tailed 

 kind, with the addition of two short white lines on the fore- 

 head, between the lower corners of the eyes. The feet are 

 black. The wings have a smoky band beyond the middle, 

 which, however, fades away towards the inner margin. I have 

 seen only females of this species, and they measure from four 

 to five tenths of an inch in length. 



It is possible that my Oryssus affinis, which is a male, may 

 be the mate of the foregoing dark-colored species, from which 

 it differs in having reddish feet, and in wanting the two white 

 spots on the forehead. It measures four tenths of an inch in 

 length. 



From this somewdiat extended account, it is evident that we 

 have very little power over the insects of the foregoing family. 



* Page 486. f Page 440. 



