NORTH OF MEXICO. 



367 



U. marginata, Leo., (Uloma) Ann. Lyo. V, 140; (Ulosonia) Gen. Col. N. A., p. a:::;. 



Similar in form to Uloma, with the margin of the elytra more reflexed. 



Length .33 inch. 



Found under Cottonwood hark, along the Gila and Colorado Rivera. 



MEROTEMNtJS, n. g. 

 This name is suggested for an elongate Ulomide with entire epipleurse and slender 

 front tibiae, differing from Ulosonia in the epistoma more prominent, suture not impressed, 

 front not tuberculate. Femora clavate and flattened, emarginate at tip, and with a broad 

 tooth at the emargination, on the middle and hind femora, 



M. elongatus, elongate, sub-parallel, moderately convex shining, ferruginous brown, Head moderately con- 

 vex, sparsely and finely punctured, not tuberculate, frontal suture not impressed. Thorax sub-quadrate, one-fifth 

 broader than long, sides nearly parallel, very feebly rounded, margin distinct, slightly reflexed, apex emarginate, an- 

 gles not, prominent, base almost truncate, angles rectangular; disc, sparsely and finely punctured. Elytra elongate, 

 more than twice longer than broad, sides slightly converging toward apex, base trunoate on "eaoh'side, emarginate at 



middle, slightly broader than base of thorax, angles rectangular; nine entire and one short scutellar stria, derately 



punctured, interstices convex, smooth. Beneath very finely and sparsely punctured. Body winged. 



Length .24 inch. 



The femora of this insect arc much more strongly clavate than any other of our genera 

 ofUlomini. The anterior lemur is not emarginate near the apex, but slightly sinuous, 

 the middle and hind pairs distinctly emarginate, the tooth of the latter being quite large 

 and rather acute at tip. 



One specimen is known to me, presented to Dr. Leconte by Mr. Ulke, who received it 

 from ( lalifbrnia. 



MTCOTROGrUp, n. g. 



This genus differs from all our other genera of Ulomini in having the presternum pro- 

 longed, mucronate and with a deeply emarginate mesosternum. From Erelm, Muls., it 

 differs in the tuberculate; head, the convex mentum with the middle lobe rather promi- 

 nent in front. The third joint of the antennse is longer than the fourth. The epipleuree 

 axe entire, nearly as broad at apex as at middle, the anterior tibia 1 dilated, very finely 

 denticulate and slightly arcuate. The hind tarsi have the first joint longer than the 

 second and third. Body winged. 



M. piceus, elongate oval, depressed, piceous, black, shining. Head rather densely punctured, suture of epis- 

 toma impressed, epistoma and sides of front ferruginous. Thorax sparsely punctured, broader than long, feebly eon- 

 vex, sides moderately rounded and margined, gradually narrowing to apex, which is rather deeply emarginate, angles 

 prominent, not acute; base strongly sinuate, bind angles rectangular. Elytra oval, one-half longer than broad, feebly 

 rounded on the sides, base emarginate at middle and truncate at sides; apex obtusely rounded. Disc with eight 

 entire and a, short scutellar stria, of moderate punctures. Stria' feebly impressed, Beneath sparsely and finely punc- 

 tured. Antenna' and legs paler. 



Length .24 inch. 



