624 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



Discussion. — The trivial name of this new species obviously refers 

 to the very strongly punctured head, a character shared with only one 

 other species, solitaria, within the subgenus. 



Dallasiellus {Dallasiellus) solitaria (Horv^th), new combination 



Plate figure 282 

 Colobophrrjs solitaria Horvdth, 1919, p. 244. 



Diagnosis. — Within the genus this species may be most readily 

 recognized by the coarsely rugopunctate head and the posteriorly 

 evanescent buccuiae. 



Description. — Male: Based on three specimens. Oblong-oval. 



Head: Length two-thirds width, 1.41(1.36-1.49) : 1.98(1.95-2.02); 

 interocular width, 1.10; juga shallowly curved, forming an elongate 

 semicircle, as long as clypeus; jugum with a single, submedian hair on 

 submargin anterior to anteocular seta; surface longitudinally convex, 

 jugum and vertex very closely, rugosely punctured; ocelli large, wider 

 than space separating them from eje; jugum ventrally polished, im- 

 punctate; maxillary plate anteriorly to antennal insertion polished, 

 with one or two distinct punctures, posteriorly cribrately punctured. 

 Antennal segments: I, 0.55(0.53-0.60); II, 0.68(0.66-0.70); III, 0.64 

 (0.60-0.66) ; IV, 0.94(0.93-0.96) ; V, 1.14(1.13-1.16). Buccuiae higher 

 than labial II, mostly cribrately punctured, abruptly evanescent pos- 

 teriorly; labium reaching between middle coxae. Labial segments: 

 I, 0.77(0.70-0.80); II, 1.25(1.25-1.26); III, 0.92(0.90-0.96); IV, 0.68 

 (0.66-0.70). 



Pronotum: Width more than twice length, 4.50(4.35-4.70) :2.21 

 (2.13-2.28); anterior margin broadly but shallowly emarginate; 

 lateral margins strongly and broadly emarginate at ends of trans- 

 verse groove, the carinate margin immediately posterior to emargina- 

 tion appearing reflexed and thickened, posterior fifth of lateral margin 

 obliquely truncated and causing margin to appear angled prebasally; 

 lateral submargin of anterior lobe with four setigerous punctures and 

 prebasal angle laterally on posterior lobe with one setigerous puncture; 

 transverse impression submedian, shallow, irregular, interrupted 

 laterally by oblique fold extending mesally from lateral constriction; 

 entire surface, except curved calli areas, with numerous, close-set 

 punctures. 



Scutellum: Longer than wide, 3.55(3.45-3.60) :2.74(2. 71-2. 79); 

 surface shining, with abundant, crowded punctures over all but apex, 

 with a feeble, interrupted suggestion of a median carina; apex slightly 

 inflated, impunctate and usually acute. 



Hemelj'tron: Clavus and corium strongly alutaceous, distinctly 

 duller than pronotum and scutellum; corial areas well defined, disc 



