104 PROCEEDINGS OF THE NATIONAL MUSEUM vol.89 



Remarks. — This typical form of the species is rare in the United 

 States, and only the one specimen from this country is known to the 

 author at the present time; various closely related species are found 

 along our southern boundaries and in northern Mexico (i. cochisa 

 Saylor and L. meadei Saylor) . 



PHYLLOPHAGA (LISTROCHELUS) MICROS (Bates) 



FiGtrRB 12, g-i 



Listrochelus micros Bates, Biologia Centrali-Americana, Coleoptera, vol. 2, pt. 2, 

 p. 170, 18S8. 



Male. — Robust-oval, rufotestaceous to rufocastaneous, strongly 

 shining, glabrous dorsally except at lateral margins of the thorax and 

 elytra. Head with front sparsely, coarsely, and somewhat regularly 

 punctate; clypeal apex moderately to strongly reflexed, surface 

 densely punctate. Antenna! club longer throughout than in L. 

 cavata but subequal to the funicle. Thorax with a small median 

 smooth space. First segment of hind tarsus nearly equal to second. 

 Upper tooth of front tibiae strong, the three teeth equidistant. Elytra 

 rather rugosely wrinlded, much more so than in L. cavata. Hind tarsi 

 nearly as long as their respective tibiae. Unless otherwise indicated, 

 the thoracic, elytral, pygidial, abdominal, and claw characters are as 

 described for L. cavata. 



Female. — Antenna! club shorter than funicle. Pygidium convex, 

 higlily polished and smooth, very finely and sparsely punctate, 

 apparently glabrous (minute hairs visible only under high power) ^ 

 apex with two obtuse lobes of moderate length, the two separated by 

 a U-shaped notch (see drawing). Abdomen convex and highly 

 polished, segments 1-5 connate; sixth segment long, apex with a 

 moderately wide emargination, the surface just before the emargina- 

 tion with a small fovea; surface moderately densely and coarsely 

 punctate, apex ciliate. Front tibiae strongly tridentate. All claws 

 with a strong median tooth, surface between the tooth and the base 

 dentate along a single margin. Hind tarsus shorter than their respec- 

 tive tibiae. Otherwise similar to the male. 



Length. — 8-14 mm. Width. — 6-7.5 mm. 



Type. — In the British Museum (Natural History). 



Type locality. — Toluca, Mexico. 



Specimens examined. — Males, 7; females, 3. Colokado: Denver, 

 Julj^ 1902 [Sa5dor]. Mexico: Pachuca, Hidalgo [Saylor]; Guerrero 

 Mills, Hidalgo [Saylor and Sanderson]; San Miguel, Hidalgo [Saylor 

 and Sanderson]; Toluca (cotype) [Saylor]. 



Remarks. — The Colorado specimen is much lighter in color than 

 the Mexican examples and a trifle more elongate; also the antennal 

 club is much more robust in the former specimen and just a little 



