CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 575 



with those of Pangaeus. Perhaps they do; perhaps they represent 

 the still unmodified "ancestral stock" from which more specialized 

 Pangaeus arose; or perhaps they are an offshoot from Pangaeus. 

 Kegardless of the reason for the admitted closeness of Pangaeus, the 

 addition of these species to that genus would create a major problem 

 of defining and separating the genera in Group B of the subfamily 

 Cydnidae. As here treated, the species groups, whether at a generic 

 level or a higher or lower level, can be recognized in a usable way — 

 surely one of the principal aims of systematics is to produce an arrange- 

 ment that is workable as well as "natural." The present author, 

 therefore, chooses to recognize the sharply impressed, subapical line 

 on the pronotum as being sufficiently diagnostic to separate Pangaeus 

 from Dallasiellus in a practical way (but even this character is sug- 

 gested by partial and vague lines or a sunken row of punctures in some 

 individual specimens of subgenus Pseudopangaeus) . 



Key to species of Dallasiellus (Pseudopangaeus) , new subgenus 



1. Corium distinctly alutaceous; peritreme abruptly terminated apically (as 



in fig. 107) californicus (Blatchley) (p. 575) 



Corium polished; apex of peritreme fusing gradually into .surrounding cuticula 

 (fig. 106) 2 



2. Scutellum distinctly longer than wide; size smaller, length of body 6.7-8.2 . . 3 

 Scutellum as wide as or wider than long; size larger, length of body 8.6-10.0. 



vanduzeei, new species (p. 582) 



3. Pronotum laterally with abundant, close-set, intermixed coarse and fine 



punctures; mesocorium with many distinct punctures throughout and 

 forming two complete rows paralleling claval suture. 



puncticoria, new species (p. 580) 



Pronotum laterally with no fine punctures between the few, well-separated, 



coarse punctures; mesocorium with one complete and the basal part of 



a second row of punctures paralleling claval suture, discally impunctate or 



with few punctures near apex discrepans (Uhler) (p. 577) 



Dallasiellus (Pseudopangaeus) californicus (Blatchley), new combination 



Plate figure 260 

 Pangaeus californicus Blatchley, 1929, p. 74.— Torre Bueno, 1939, p. 180. 



Diagnosis. — The finely but distinctly alutaceous surface of the 

 corium sets this species apart from the others in the subgenus. 



Description. — Male: Elongate-oval, widest immediately anterior 

 to base of pronotum. 



Head: Length two-thh-ds width, 1.46(1.38-1.56) :2. 13(1.97-2.34) ;in- 

 terocular width, 1.30(1.17-1.44) ; anterior margin approximately semi- 

 circular; juga a little longer than clypeus and contiguous beyond it; 

 jugal surface moderately rugose on apical half, minutely punctured 

 anterior to ocelli, with three or four widely separated, submarginal 

 setigerous punctures; juga ventrally polished; maxillary plate aluta- 



