80 PROCEEDINGS OF THE NATIONAL MUSEUM vol.89 



the latter character the group approaches the subgenus Chlaenobia, 

 though the tarsal claws m the two subgenera are of course quite dis- 

 similar. The present species varies somewhat in the number of 

 antennal segments but this is not at all uncommonly met with especially 

 in the more typical members of the genus {Phyllophaga sensu stricto). 



PHYLLOPHAGA (LISTROCHELUS) SCOPAKIA (LeConte) 



Figures 2, d; 3, g; 4, b, e; 7, e, f 



Listrochelus scoparius LeConte, Journ. Acad. Nat. Sci. Philadelphia, ser. 2, vol. 

 3, p. 264, 1856.— Horn, Trans. Amer. Ent. Soc, vol. 7, p. 142, 1878.— 

 Bates, Biologia Centrali- Americana, Coleoptera, vol. 2, pt. 2, p. 173, 1888. 



Male. — Oblong-oval, rufocastaneous, thorax more rufous; elytra 

 slightly to markedly pruinose, with scattered pile. Head with a 

 strong transverse carina on the vertex, front densely, moderately 

 finelj'- punctate; clypeus longer than front, less densely punctured; 

 apex slightly reflexed, subtruncate and faintly emarginate, angles 

 narrowly rounded. Antenna 10-segmented, club slightly longer than, 

 or subequal to, the funicle. Labrum deeply bilobed. Thorax finely, 

 regularly, and moderately densely punctured, glabrous except for a 

 few minute hairs near basal margin; angles rounded in front, obtuse 

 behind; lateral margins ciliate, coarsely crenulate, less so in basal 

 half; base and apex both strongly margined. Elytra punctured as 

 thorax, with moderately sparse, short, erect hairs; striae except sutural 

 not evident. P3'^gidium strongly convex, finely, moderately densely 

 punctured, with short suberect hairs; surface somewhat pruinose; 

 apex wide and truncate, apical margin thickened. Abdomen with 

 segments 1-5 inclusive flattened at middle and sparsely, finely punc- 

 tured and pubescent; fifth segment with a small, triangular-shaped, 

 elevated, plateaulike area beginning in apical half and continuing to 

 the apical margin; sixth segment much larger than fifth, with a very 

 strong transverse carina at middle, the carina deeply incised and form- 

 ing at its ends two strong toothlike lobes, surface in basal half of 

 sixth sparsely punctured, nonpilose, that of apical half moderately 

 densely punctate and with rather long, erect hair. Hind tarsus only 

 as long as the tibia and rather densely pilose below. Hind tibia 

 somewhat more densely pilose on the inner side than in most of the 

 species of the subgenus. All claws pectinate on a double margin, 

 without larger intermixed teeth. 



Female. — Antennal club shorter than funicle. Pygidium flat in 

 basal two-thirds, abruptly gibbose in apical third, the latter very 

 €oarsely and rugosely punctured, and polished; basal area highly 

 pruinose, with dense and fine punctures, and moderately long, erect 

 hair ; pygidial disk in lateral view appearing rather concave. Abdomen 



