A 



OF WASHINGTON. 127 



The species is by no means commonly found, as in all these 

 years only eight specimens are recorded. 



A close examination of the specimens from this fresh ma- 

 terial with a high-power microscope disclosed the presence of 

 two distinct ocelli, which are placed very near together on the 

 narrow vertex of the head. (In the engraving of the insect 

 that accompanies Professor Uhler's paper the ocelli have been 

 overlooked.) The possession of ocelli, besides the remarkably 

 shaped and depressed head, makes it now evident that the 

 species Heidemannia cixiiformis Uhler has to be placed in the 

 subfamily Isometopinse, probably near the genus Myiomma. 



In the year i860 Dr. F. Xaver Fieber founded the genus 

 Isometopus,^ based on two species, Acanthia intrusa Herrich- 

 Schaffer'' and Isometopus alienus Fieber. He raised the genus 

 to the rank of a family next to the Capsidse. Later on, in 

 1875, Prof. O. M. Renter'^ treated it as a subfamily of the 

 Capsidae, which view is generally adopted now. The principal 

 character of the Isometopinae is the presence of two ocelli and 

 the peculiar form of the head. In the Old World three species 

 have been known and two genera, Isometopus Fieber and 

 Myiomma Puton.^ Recently Dr. W. L. Distant, in his Fauna 

 of British India,® described three new species and two new 

 genera, Isometopus feanus, Turnebus ciineatus, and Sophianus 

 alces. 



The occurrence of Isometopinse in the New World has not 

 been recorded before. The U. S. National Museum possesses 

 a few examples, collected by Messrs. Schwarz and Barber at 

 San Diego, Tex., Williams, Ariz., and Las Vegas Hot Springs, 

 N. Mex. Others were taken in the East by Mr. N. Banks at 

 Long Island, N. Y., Falls Church, Va., and by myself at 

 Aurora, W. Va. The material now on hand comprises three 

 new species, besides Uhler's Heidemannia cixiiformis and an 

 undescribed nymph of the same. I think it advisable to place 

 these new species in the old genus Isometopus, because our 

 knowledge of the group from this continent is very limited on 

 account of the small number of specimens secured up to the 

 present time. Nevertheless, the description of these species 

 now may induce other collectors of Hemiptera to hunt for these 



" Fieber. — Exegesen. Wiener Ent. Monatschrift, iv, pp. 258-259 

 (i860) ; Europ. Hem. Wien, pp. 26, 237 (1861). 



" Herrich-Schaffer.— Wanz. Ins., vi, p. 48, % 608 (1839). 



" Reuter.— Bih. Vet. Ak. Handl., m, i, p. 61 (1875). 



^Puton. — Hemipteres. Ann. Soc. Ent. France, Vol. ni, ser. 5, pp. 

 20-21 (1873). 



' Distant.— Fauna Brit. Ind., Vol. n, pp. 483-486 (1904)- 



