April-June, 1920 Bulletin Broioklyn Entomological Society 81 



Meanwhile, study of the Minnesota specimens had shown that 

 the Corixid in question was an undescribed species of the genus 

 Cymatia — a conclusion which has kindly been verified by my 

 friend Mr. J. R. de la Torre-Bueno. 



Cymatia was proposed by Flor in. i860 (Rhynch. Livl., i, pp. 

 7^3' 799) as a subgenus of Corixa, to include Sigara cole^optrata 

 Fabr. and Corixa bonsdorffi C. R. Sahlberg, both of which are 

 widely distributed in the Palsearctic region. Two other species 

 have since been described from the Old World, but until now 

 the genus has not been recorded in America — indeed, the present 

 species is the first one known outside the Palsearctic region. The 

 genus may be characterized as follows. 



Head, together with the eyes, broader than the pronotumi ; eyes 

 more widely removed from the hind margin of the head than in 

 Corixa, Arctocorisa, etc. Vertex horizontal, tumidly projecting 

 between the eyes, and forming a sharp angle (best seen from the 

 side) with the f rons ; vertex with a more or less distinct carina, 

 and with a shallow depression each side behind the middle. 

 Frons slightly concave in males, flat in females. Clypeus smooth. 

 Pronotum broader than long, the anterior half, at least, with a 

 median carina. Scutellum concealed by pronotum. Body broadest 

 behind the middle. Pala suh cylindrical, a little curved inwardly, 

 at least five times as long as it is thick, 2^/2 to 3 times as long 

 as the tibia, to which it is closely united ; pala with a single apical 

 spine or claw which is at least one third as long as the pala 

 itself, and with two rows of very long bristles ; pala without 

 stridular pegs. Fore femur without stridular area. Asymmetry 

 of abdominal segments of male dextral; strigil absent. 



Through the kindness of Mr. Bueno, I have been able to ex- 

 amine specimens of the three European species. I have not seen 

 Cymatia jaxartensis Kiritschenko, which was described from 

 Turkestan (Rev. Russe Ent., xi, 191 1, p. 92), nor do I have 

 access to its description at present. The four species known to 

 me may be separated as follows : 



I. Head shorter than the pronotum, which is about three 

 fourths as long as it is wide ; pronotum with fine reticu- 

 late markings similar to those of the hemelytra (south- 

 eastern Europe) C. rogenhoferi Fieb. 



