June, 1919 Bulletin of the Brooklyn Entomological Society 109 
A MORPHOLOGICAL NOTE ON THE TINGOIDEA. 
By H. M. ParsHiey, Smith College, Northampton, Mass. 
In the Piesmide and Tingide the hemielytra exhibit a struc- 
tural feature which, I believe, has never been employed in char- 
acterizing the superfamily Tingoidea, and which seems to have 
been entirely overlooked except for a brief mention in de la Torre 
Bueno’s description of Corythaica bellula.* This structure, which 
I propose to term the hypohemielytral lamina, is a reticulated 
ridge projecting ventrally from the first longitudinal vein within 
the costal margin of each hemielytron and extending from the 
base of the wing to a point at or a little beyond the apex of the 
abdomen. It follows closely the outline of the abdomen and 
obviously serves to strengthen very considerably the body of these 
delicate and fragile insects, preventing any undue overlapping of 
the hemielytra and contributing an element of rigidity. Our 
knowledge of the venation of the Heteroptera, as set forth in 
Comstock’s recent book,} is rather meager and affords little as 
sistance in determining the homologies involved, but the sugges- 
tion is ventured that the hypohemielytral lamina may have some- 
thing to do with the subcostal fold, a structure of wide occur- 
rence among insects, although the fully developed lamina is not 
apparently double. ; 
Usually the hypohemielytral lamina is a rather low ridge, of 
nearly uniform height throughout its length, and containing a 
single series of clearly defined areoles,—conditions which obtain 
in the following genera: Acalypta, Stephanitis, Gargaphia, Lepto- 
styla, Physatocheila, Melanorhopala, Alveotingis, Hesperotingis, 
Teleonemia, Tingis, Catoplatus, Oncochila. In Atheas, Copium, 
Monanthia, and Serenthia the lamina is extremely narrow and 
the areoles very small, while in Piesma the areoles are scarcely 
perceptible and the lamina is reduced to a mere beading. In 
Corythucha and Acysta there is a single series of small areoles 
and the lamina is narrow, widened distinctly at base in the former 
* A New Species of Tingid from New York, Butt. Brooktyn ENT. 
Soc., 1917, vol. 12, pp. 19-20. 
+ The Wings of Insects, 1918, Ithaca. 
