50 The Ohio Journal of Science [Vol. XX, No. 3, 



Corythucha marmorata var. minutissima new variety. 



Hood slightly more than twice the height of median carina and one 

 and one-half times as long, the length of hood one and one-third times 

 its height. Lateral carinse well delveoped, not widely separated from 

 hood, with four distinct areolee. Antennas reaching a little beyond 

 posterior margin of paranota, clothed with several long bristly hairs, the 

 third segment slightly more than twice the length of the fourth. Aledian 

 carina raised anteriorly, two rows of areolae at middle, its height one-half 

 its length. Elytra extending a little beyond the apex of abdomen, costal 

 area with the outer margin distinctly concave, biseriate at the middle 

 and triseriate anteriorly and posteriorly. Marginal spines of elytra and 

 pananota rather small. Length, 2.37 mm.; width, 1.49 mm. 



Body beneath piceous, legs and antennae brown. Disc of pronotum 

 brown, the posterior extension becoming lighter towards apex. General 

 color of membraneous portions whitish, with brown marmorations 

 quite like a fully colored example of typical marmorata. 



Almenda, California, November 16, 1911, collected by 

 F. W. Nunemmacher. The very small size and lateral carinae 

 will at once distinguish this form from either typical marmorata. 

 Uhler or the variety ijiformis Parshley. Parshley^ gives a 

 good discussion of the variations of marmorata which agree 

 with the many specimens before me. The lateral carinas in 

 variety minutissima are developed as in C. morrilli Osborn and 

 Drake. C. morrilli, according to the numerous specimens 

 at hand, is a very variable species. C. mexicana Gibson, if it is 

 distinct, is not more than a variety of C. morrilli O. & D. 

 Type in my collection. More specimens may prove minutissima 

 to be a distinct species. 



Corythucha heteromelecola new species. 



Hood moderately elevated, abruptly constricted near the middle, its 

 height slightly more than one-half its length. Median carina mod- 

 erately arched, with two rows of areolae at middle, distinctly shorter 

 than the hood. Lateral carinae terminating far from base of hood, 

 raised anteriorly, with three or four distinct cells and with the anterior 

 cell largest. Antennas beset with a few long bristly hairs. Spines on 

 margins of elytra and paranota rather short. Rostnmi reaching almost 

 to tip of rostral sulcus. Elytra with costal margin distinctly concave, 

 the costal area triseriate. Length, 3 mm.; width, 1.9 mm. ' 



General color above light yellowish brown. Areolae mostly hyaline. 

 Neryures yellowish. Crest of hood slightly embrowned. Elytra with 

 tumid elevation and sutural area more or less embrowned, the trans- 

 verse bands only faintly outlined or entirely wanting. 



1 Occasional Papers of the Museum of Zoolog}-, Univ. of Michigan, No. 71, 

 page 20. 



