460 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iii 



Pangoeus [I] spangbergi Signoret, 1882, p. 259, pi. 9, fig. 116. New synonymy. 

 Pangaeus spangbergi Uhler, 1886, p. 3. — Lethierry and Severin, 1893, p. 70. — 



Banks, 1910, p. 101.— Van Diizee, 1917, p. 21.— Torre Bueno, 1939, p. 180. 

 Pangaeus uhleri Uhler, 1886, p. 3 — Lethierry and Severin, 1893, p. 70. — Banks, 



1910, p. 101.— Van Duzee, 1917, p. 21. 

 Pangaeus douglasi Lethierry and Severin, 1893, p. 69. 

 Pangaeus scotti Lethierry and Severin, 1893, p. 70. 

 Pangaeus vicinus Lethierry and Severin, 1893, p. 70. 



Diagnosis. — As can bo deduced from the key to species, bilineatus 

 is probably best characterized within the subgenus mostly by negative 

 characters: (1) no tubercles on ventral surface of posterior femora; (2) 

 no punctures in subapical impression of the pronotum; and (3) the 

 presence of three or more submarginal setigerous punctures on each 

 jugum. 



Description. — Male: Oval, widest behind the middle. 



Head: Length about two-thirds width, 1.20(1.03-1.26): 1.70(1.58- 

 1.87); interocular width, 1.09(0.96-1.16); anterior outline a fall semi- 

 circle or less, usually evenly curved; clypeus usually as long as juga, 

 little narrowed apically; jugum submarginally with three to five 

 setigerous punctures, usually with feeble to obsolete radiating rugae; 

 surface somewhat convex, punctures obsolete or absent; ocelli moder- 

 ately large, separated from eye by a space less than twice transverse 

 ocellar width; jugum ventrally and maxillary plate (except basally) 

 polished, impunctate. Antennal segments: I, 0.34(0.28-0.40); II, 

 0.32(0.27-0.43); III, 0.40(0.30-0.46); IV, 0.47(0.34-0.56); V, 

 0.50(0.36-0.60). Bucculae almost as high as labial II; labium reaching 

 between middle coxae. Labial segments: I, 0.60(0.50-0.66); II, 

 0.90(0.73-1.00); III, 0.73(0.70-0.78); IV, 0.46(0.36-0.50). 



Pronotum : Length more than half of width, 2.04(1.69-2.28) :3. 73 

 (3.24-3.97); anterior margin moderately, simply emarginate; side 

 margins entire, nearly straight on middle third, lateral submarginal 

 row of nine to twelve setigerous punctures; transverse impression sub- 

 median, obsolete to absent, impunctate or marked by irregular row of 

 distinct punctures; anterior lobe impunctate or sometimes with few 

 (one to five) weak punctures laterally; posterior lobe impunctate or 

 with few to a dozen punctures medially. 



Scutellum: Length equal to or slightly longer or shorter than width, 

 2.31 (1.95-2.53): 2.32 (2.02-2.47) surface obsoletely alutaceous (not 

 polished), with numerous punctures discally except across base and at 

 extreme apex, 



Ilemelytron: Corium and clavus distinctly alutaceous; clavus 

 usually with one or two partial rows of distinct punctures; mesocorium 

 with one complete and a second partial or complete row of punctures 

 paralleling claval suture, disc obsoletely, rarely distinctly punctured; 

 exocorium with numerous punctures usually more distinct than those 



