622 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



Hem elytron: Corium finely but distinctly alutaceous; exocorium 

 with few moderate punctures near base and apex; mesocorium im- 

 punctate except for rows bordering claval suture; clavus with one 

 complete row and one incomplete row of punctures; costa with two 

 setigerous punctures; membrane reaching apex of abdomen, longer 

 than basal width. 



Mesopleuron: Evaporatorium reaching uninterrupted to postero- 

 lateral angle of segment ; posterior margin entire. 



Metapleuron : Lateral margin of evaporatorium gently concave. 



Legs: Posterior femur not tuberculate medio ventrally; posterior 

 tibia simple. 



Sternites: Polished, impunctate except along basal margin and 

 near spiracles. 



Terminalia: Genital capsule with posterior margin faintly emar- 

 ginate either side of broad, blunt apex; gonostylus as illustrated 

 (fig. 280). 



Length of body: 10.35. 



Type data. — Holotype male (Hung), "Brasilia: Rio de Janeiro." 



Specimens studied: 2 males, as follows: 



Brazil: Rio de Janeiro, type male (Hung) and another male (Hung) with 

 same data. 



Discussion. — This species, like most of the other large species of 

 the subgenus (in couplets 7-9 of the key to species), is represented 

 by very limited material — one specimen in this case. With such 

 limited material the worker has little chance to evaluate the differences 

 that do appear. Untd more specimens become available these species 

 must be accepted. 



Dallasiellus {Dallasiellus) puncticepSf new species 



Plate figure 281 



Diagnosis. — The coarse, close-set punctures on the surface of the 

 head plus the abrupt posterior termination of the bucculae mark 

 puncHceps from all others in the subgenus. 



Description. — Based on one male. Elongate-oval, almost parallel- 

 sided, widest behind midlength. 



Head: Length almost two-thirds width, L16:1.81; interocular 

 width, 1.03; anterior outline semicircular, juga longer than and con- 

 tiguous beyond clypeus; surface depressed either side of midline, 

 coarsely and subrugosely punctate over most of surface posteriorly to 

 ocellar area; jugum with one setigerous puncture immediately anterior 

 to eye; ocelli large, separated from eye by space subequal to trans- 

 verse diameter of ocellus; jugum ventrally polished, impunctate; 

 maxillary plate coarsely punctured, more densely so on basal third. 



