Casey — A Revision of the American Paederini. 155 
anterior more or less strongly dilated in both sexes. Palaearctic and 
Nearctic regions. [= Ramona Csy.].-++ see seeeees .---Pseudomedon 
Body minute in size, feebly, not very densely sculptured, the head and elytra 
larger than the prothorax; palpi well developed; gular sutures as in 
Pseudomedon but less widely separated; mentum shorter, strongly 
transverse; antennae short, unusually enlarged or claviform distally; 
eyes well developed; neck fully two-fifths as wide as the head; pro- 
sternum scarcely at all carinate; hind tarsi rather long, very slender and 
filiform, the basal joint distinctly shorter than the next two combined, 
the anterior merely thicker, not at all dilated. Regions bordering the 
Gulf Of MEEIGO 6 ckiiei vinn dedwadchbies er sekussumadine vamese oe cake ROR 
The European Hypomedon Rey, is included for comparison 
and completeness; it is undoubtedly distinct from Medon and 
not a subgenus as stated by Heyden, Reitter and Weise in the 
catalogue of those authors. Micromedon (n. gen.) is founded 
upon the European Medon seminigrum, of Fairmaire. It is 
more closely related to Hypomedon than any other genus, but 
differs greatly in habitus and in labral structure, as well as in 
its non-spongiose anterior tarsi and minute eyes. 
Neomedon Shp. 
The genus Neomedon, as outlined by Dr. Sharp in the 
‘¢ Biologia,’’ has the body subdepressed, the labrum short, 
broad, scarcely or not at all emarginate and minutely trituber- 
culate at each side, the first joint of the posterior tarsi one- 
half longer than the second and the anterior slightly dilated. 
In view of these characters, in connection with the compara- 
tively large size of the species, and the fact that the genus 
appears to extend to the northernmost limits of the regions 
covered by the ‘* Biologia,’’ leads me to believe that the 
following species, from which the generic diagnosis of the 
above table is taken, is truly a member of the genus under 
consideration :— 
Body stout, subdepressed, parallel, black in color, the elytra, legs and an- 
tennae more orless bright rufous, the surface distinctly shining, with 
the punctures of the head coarse, rounded and distinctly separated, 
those of the pronotum finer but almost as close-set and about equal to 
those of the elytra, the abdomen very minutely and densely punctulate, 
head large, distinctiy wider than long, parallel and straight at the sides; 
the basal angles rather broadly rounded, the base broadly sinuate; 
