224 PROCEEDINGS OF THE ACADEMY OF [PaRT II 



The type of this handsome, though plainly bicolored species, is 



unique. 



DASYBLATTA39 new genus 



This genus is erected to include two anomalous species, ihaumasia, 

 described on page 225, and cho'pardi, described on page 257, appar- 

 ently referable to the Group Blattellae, but exceptionally distinc- 

 tive in being clothed with microscopic hairs and in having the in- 

 tercalated triangle curled and tubuhform when at rest.^" 



The insect further shows decided similarity to some of the smaller 

 species of the genus Ischnoptera, belonging to the Group Ischnop- 

 terae, in the general contour, and particularly that of the head and 

 pronotum. 



In linear position we place Dasyhlatta after Platylestes and before 

 Chromatonoius, no close relationship to any previously described 

 genus, however, being indicated. 



Genotype. —Dasyhlatta thaumasia new species. 



Generic Description. Based on the male sex. Size small, form 

 slender, structure not as delicate as is usual in the Group, entire 

 surface, when tegmina are closed, decidedly hairy. Interocular 

 space rather broad to decidedly narrow; ocelli distinct, with flat 

 surfaces of ocellar areas forming a rather sharp angle with the 

 interocellar space. Eyes extending ventrad nearly to maxillary palpi. 

 Maxillary palpi comparatively short, with fifth segment longest 

 of all. Pronotum moderately convex, laterad decidedly so to the 

 very narrowly concave lateral portions, disk with two broad but 

 distinct sulcations mesad, which converge caudad; cephalic margin 

 transverse, much broader caudal margin weakly convex, point of 

 greatest width meso-caudad. Tegmina and wings fully developed. 

 Tegmina hirsute, anal field very elongate, discoidal sectors longi- 

 tudinal." Wing with costal veins not enlarged, discoidal and un- 

 branched median vein connected by numerous transverse veinlets; 

 ulnar vein with (1) complete branch, showing numerous transverse 

 veinlets and very numerous bases of these toward fold of the wing, 

 intercalated triangle very broad and conspicuous, curling in a tube 

 when the wings are at rest. Dorsal surface of abdomen unspecial- 

 ized. Subgenital plate with a process sinistro-proximad, which 

 lies outside of, and alongside, the cereal base. Limbs heavy for the 

 group. Ventro-cephalic margin of cephalic femora armed with a 



33 From oaa6-|3XczTTa = A hairy cochroach. 



^^ In these features only, agreement with the genus Oulopteryx, described in 

 the present paper and assigned to the Corydiinae, is shown. The ensemble of 

 characters, however, leads us to believe that the present genus is a member of 

 the Pseudomopinae. 



*^ In the specimen described as D. cho-pardi on page 257, the discoidal sectors of 

 the dextral tegmen toward the sutural margin are, however, moderately oblique. 



