AMERICAN COLEOPTERA. 215 



{Type). — Fulvous, antennse, palpi, tips of mandibles and elytra black; 



knees and tarsi dusky. 

 a. — Like type, but first and second joints of antennse, and entire margin 



of elytra yellow. 

 0, — Yellow, antenn», tips of mandibles, palpi and tarsi more or less 



black. 



Protborax strongly not densely punctured ; elytra strongly rather densely 



punctured; black, head, protborax, scutel and thighs reddish-yellow ; 



last ventral segments usually testaceous; % fourth ventral slightly, 



fifth more strongly foveate, sixth triangularly eraarginate; 5.5 — 6.5 mm.; 



Col.; N. Mex , 16. sparsa Lee. 



3. — Fulvous, protborax and elytra not coarsely, but densely punctured, an- 

 tenna (except at base), palpi, tips of mandibles, tibise and tarsi, black ; 

 % fifth ventral with a short channel near the hind margin, sixth slightly 

 but acutely emarginate; 8.S — 11mm.; 111.; Mo.; Tex.. .17. vittigera Lee. 

 <u — Elytra with a broad black stripe. 

 Fulvous, protborax very coarsely, elytra strongly and densely punctured ; 

 sides of protborax rounded in front; antennse, etc., and tarsi blackish; 

 % fifth ventral slightly impressed near the hind margin, sixth triangu- 

 larly emarginate; 6 — 9 mm.; Southern and Western States; Texas.* 



18. cribricollis Lee. 

 •a. — Smaller, under surface in great part brownisli ; perosa Lee. 

 p. — Elytra brown, with fulvous border, 

 y. — Elytra dark brown ; fuscipennis Lee. 



DIODYRHYNCHUS Sch. 



I refer to this genus a pale colored insect from the Sierra Nevada, 

 larger and stouter than our species' of Rhinomacer, having like them 

 simple claws, distinct labrum, and curved mandibles, not toothed on 

 the outer margin. It differs however by the shorter palpi, and distinct 

 €pipleurjB, thus showing an affinity towards the Rhynchitidae. 



D. bytaroides. — Obloag-oval, rather elongate, convex, testaceous, finely 

 |iubesceut. Beak as long as the protborax, cylindrical, curved, strongly punc- 

 tured, with two grooves and a fine medial carina, behind the antennse which 

 are inserted about the middle; cavities behind the antennte broad, lateral; 

 head convex, densely punctured., eyes rounded, slightly convex. Protborax 

 wider than long, narrower in front, where it is slightly constricted, front 

 margin sinuate, elevated; sides strongly rounded, disc densely punctured. 

 Elytra punctured like the protborax, distinctly margined at the sides, entirely 

 covering the pygidiura. Under surface punctured, abdomen piceous, last seg- 

 ment testaceous. Legs stout, rather k>ng. Length 4 — 5 mm. 



% . — Protborax widest in front of the base, sides more rounded. 



J- — Protborax widest at the base, sides less rounded. 



Sierra Nevada, Gala.; collected by Mr. H. K. Morrison. No notes 

 of its habits have been furnished to me. 



*The muzzle is long in this species, and the last joint of the maxillary palpi 

 is slightly dilated and elongate-triangula*, thus forming an excellent transition 

 to Gnathium, 



