98 
Psyche 
[September 
best to designate this as a new genus and place it near 
Tanarthrus, but with some doubt as to its affinities. 
Leptanthicus gen. nov. 
Slender and flattened, with short elytra that leave the 
main part of the abdomen exposed. Metathoracic wings 
present but folded under the elytra in repose. Antennae 
normal and with the last segment not divided into two 
apparent segments by a groove. Mouth parts apparently 
normal, with the last segment of the maxillary palpi not 
expanded or otherwise modified. Pronotum rather slender, 
without any obvious modifications. Mesosternum not ex- 
panded laterally, the margins straight and ending near 
the outer edges of the mesocoxae. Legs not modified in 
the male, with two spurs on all the tibiae. Male genitalia 
without separate parameres, slender and pointed as in 
Tanarthrus. Internal sac without spines but with a com- 
plex and unique structure around the gonopore. Type of 
genus Leptanthicus staphyliniformis sp. nov. 
i c Leptanthicus staphyliniformis sp. nov 
Holotype $ : almost uniformly brown in color, with 
darker abdomen and paler elytra, antennae, palpi, tibiae 
and tarsi. Surface generally finely punctured, with short 
and fine but moderately dense pubescence, not conspicuous 
except under some magnification and with longer, erect tac- 
tile setae scattered over the dorsal surface of the body. 
Length, to tip of elytra 1.97 mm., to tip of abdomen ca. 
2.68 mm. Width: head 0.46 mm., pronotum 0.41 mm., and 
elytra ca. 0.56 mm. 
Head narrowly quadrate, flattened, the disc almost 
flat, 0.51 mm. long to base of clypeus and 0.46 mm. wide. 
Surface subopaque because of moderately dense but fine 
microreticulation; pubescence short, about 0.02 mm. long, 
mostly subdecumbent and slightly curved, fine and directed 
toward the midline on the disc. Eyes small, 0.17 X 0.13 
mm., placed well onto the sides and protruding only slight- 
ly from the sides of the head; with short, erect pubescence. 
Fronto-clypeal suture distinct though short. Bases of an- 
tennae separated by 0.18 mm. Clypeus fairly broad, 0.23 
