602 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iii 



irregularly spaced, coarse punctures; posterior lobe with some scattered 

 coarse and fine punctures. 



Scutellum: Length-width ratio, 3.45:2.66; polished, with about 15 

 small punctures scattered over disc; apex impunctate, 



Hemelytron: Polished; clavus with three incomplete rows of 

 punctures; mesocorium with two rows of coarse punctures paralleling 

 claval suture and a few coarse and numerous fine punctures scattered 

 over surface; exocorium with a few coarse punctures; costa with 

 three setigerous punctures on the left side and two on the right; 

 membranal suture straight, lateral angle slightly produced posteriorly; 

 membrane little longer than basal width, slightly surpassing tip of 

 abdomen. 



Propleuron: Polished, impunctate except immediately above coxa 

 and in depression; prosternal carinae little more than half as high 

 as labial II. 



Mesopleuron: Evaporatorium entire, reaching posterolateral angle 

 of segment; lateral area with three punctures. 



Sternites: Polished, impunctate, laterally with few horizontal, 

 obsolete rugae. 



Length of body: 9.35. 



Type data. The label on the specimen in the Signoret collection 

 (Wien) agrees with Signoret's listing from "Missiones" and so must 

 be the type. 



Specimen studied. — 1 female (type), from Misiones, Argentina. 



Discussion. — This species appears to be somewhat of an inter- 

 mediate between Dallasiellus and Tominotus because the preocular 

 row of submarginal setigerous punctures is almost complete, the 

 only gap appearing between the three punctures unmediately anterior 

 to eyes and the remaining ones of the row, which are finer and set 

 closer together. 



Dallasiellus (Dallasiellus) dilatipes, new species 



Plate figures 128, 149, 272 



Diagnosis. — Since this species is known only from the male, 

 separation must be made on the basis of that sex. The strong and 

 unusual modifications of the male form the most convenient features 

 for characterization: The peculiar quadrate lobe at the apex of the 

 ventral margin of the anterior tibia (fig. 128) ; the costa strongly 

 flattened and depressed; and the posterior femur with prominent 

 strong knob near middle of ventral margin and spines of posteroventral 

 row on hind tibia directed downward from prominent tubercles 

 (fig. 149) instead of the usual oblique position from a serrated margin. 

 Any one of these is sufficient to separate the males of this species 

 from those of any other species within the genus. 



