164 ENTOMOLOGICAL NEWS [xxxii, '21 



i 



These genera we place at the end of the Corydiinae' and, 

 though very distinct, are in our opinion clearly of closer affinity 

 to the other genera included in that subfamily than to Oxyhaloa. 

 Chorisoneura and the remaining genera we have recognized, at 

 least tentatively, as members of the subfamily Oxyhaloinae. 

 Material representing a sufficient number of the genera and 

 species of these subfamilies is at present not available for the 

 thorough rearrangement evidently needed. 



To the genus Hypnorna nearest affinity is indicated, Euh\p- 

 norna differing in the male sex in the narrower interocular 

 width, pronotum with caudal margin very broadly convex in- 

 stead of truncate, tegmina which do not taper distad and con- 

 sequently are more broadly rounded at the apices and tegminal 

 discoidal sectors which are longitudinal "instead of oblique. 2 

 Numerous other distinctive generic differences will probably 

 be found when Hypnorna can be more fully characterized. 



Genotype. Huhypnorna grata new species. 



Generic Description (based on male sex). Size small, form 

 slender. Surface of head, pronotum and tegmina well sup- 

 plied with erect, elongate, scattered hairs. Head with eyes 

 very large and interocular space comparatively narrow, ocelli 

 absent. Antennae supplied with a not unusual number of short 

 hairs. Pronotum symmetrically trapezoidal with margins 

 weakly convex and angles broadly rounded, lateral margins 

 weakly divergent caudad, latero-caudal sulci weakly indicated 

 and very broad. Tegmina elongate and narrow, with margins 

 parallel to near the distal portion, discoidal sectors longitudinal 

 except at sutural margin. Wings with costal veins not clubbed, 

 mediastine vein extending over two-thirds distance to apex of 

 wing, discoidal vein with one branch, ulnar vein with one 

 branch, intercalated triangle large and distinct. Dorsal surface 

 of abdomen with sixth tergite specialized. Subgenital plate 



2 Compared with Saussure and Zehntner's more detailed description of 

 Hypnorna, the present genus is seen to differ further in having the head 

 without a carina and sulcus between face and vertex, the wings with 

 costal veins not clubbed distad and the ulnar vein with a single complete 

 branch. These features may be found in blanda Saussure and Zehntner, 

 but we cannot determine whether they are true for the genotype, 

 meli Stal. 



