16 



TOBACCO-WOBJI. PARASITE'S DESTBOTER DESCRIBED. 



long to the end of its body, and is of a dark or bottle green color with a 

 brassy reflection, and finely sliagreened upon the head and thorax. The 

 head is large and placed transversely, about three times as broad as it is 

 long, convex in front and concave at its base. Viewed in front it is nearly 

 circular, with a large oval eye sliglitly protruding upon each side, of a 

 dull red color fading to brown after death. On the crown three ocelli or 

 eyelets appear as glassy dots placed at the corners of a triangle. The 

 jaws are yeUow, their ends brown, with four minute teeth. The palpi or 

 feelers are dull white. The antenna; are inserted in the middle of thejface 

 and when turned backward reach about half the length of the thorax. 

 They become a little thicker towards their tips, and are of a brown color 

 with the long basal joint dull pale yellow, and are clothed with a short 

 incumbent beard. They are composed apparently of nine joints, the first 

 joint being long and smooth, and forming an angle with the remaining 

 joints. The second joint is the smallest of the series, being but little 

 longer than thick and obconic in its form. The third joint is thrice as long 

 and nearl}' thrice as thick as the preceding, and has the shape of a pear, 

 the contracted portion of its base being formed of two rings or small joints 

 which are rarely perceptible even in the live specimen when highly magni- 

 fied, except these organs be put upon the stretch. The fourth and fol- 

 lowing-joints are a third shorter than the foregoing, and are ncarlj' equal 

 and square in their outline, each successive joint very slightly increasing 

 in thickness and diminishing in length. The last joint is about thrice as 

 long as tiic one preceding it, of an oval or sub-ovate form, rounded at its 

 base and bluntly pointed at its apex, and is probably composed as in the 

 other species of this genus of three joints compactly united together. 

 The thorax scarcely' equals the head in width and is egg-shaped and thrice 

 as long as wide. On each shoulder is a slightly' impressed line extending 

 obliquely backward and inward. The abdomen is a third shorter than the 

 thorax, and in the live insect surpasses it in thickness, is egg-shaped and 

 convex with its tip acute pointed. When dried it scarcely equals the 

 thorax in thickness, and becomes strongly concave on the back and trian- 

 gular when viewed from one side. It is smooth, polished and sparkling, 

 of a green black color, the middle segments each with a broad purple 

 black band visible in particular reflections of the light. Beneath it is black 

 and at the tip shows some fine impressed longitudinal lines forming the 

 edges of the groove in which the sting is inclosed. The /fi^.s are slender, 

 pale wax yellow, with the feet and ends of the shanks dull white, the hips 

 of the hind legs being stout and black, with their outer faces green blue 

 and their tips pale yellow. The feet are five-jointed and dusky at their 

 tips. The wings are transparent and reach slightly beyond the tip of the 

 abdomen when at rest. The anterior ones are broad and evenly rounded 

 at their ends, and have, near the outer margin, a thick brown rib or sub- 

 costal vein extending more than a third of their length and then uniting 

 with the margin and terminating some distance forward of the tip, after 

 sending off a short straight stigmal branch which is thickened at its end, with 

 its apex notched. Towards the inner margin an exceedingly fine longitu- 



