154 GEO. H. HORN, M. D. 



tibicG slender and acute while in cinerea the spurs are both stout and 

 very obliquely truncate at tip. Superficially oregnna j^reatly resembles 

 some of the forms of maculata, but the male sexual characters at once 

 suffice to separate it. 



Several specimens collected in Oregon, by Mr. Wm. M. Gabb. 



E. Alphonsii Horn, Trans. Am. Ent, Soc, 1874, p. 38, should be 

 placed near maura Lee, the middle femora beinii similarly dilated in 

 the male, a specimen of which was kindly given me by the late Jules 

 Thevenet. It differs from maura in having the suture and margin 

 narrowly bordered with white pubescence. 



GNATHOSPASTA, n. g. 



Antennae setaceous, eleven-jointed, first joint moderate with a slight 

 sinuation in front near the tip, second joint short, half 

 the length of the third, these two together but little 

 longer than the first, joints 4 — 11 gradually longer. 

 Eyes elongate oval, twice as wide as long, emarginate 

 in front. Labrum very deeply emarginate, mandibles 

 prominent, pincer like. Labial palpi rather slender. 

 Other characters as in Epicauta. 



The mandibles are very much more prominent than in any vesicant 

 in our fauna; they meet at tip and are directly opposed along a straight 

 line and not emarginate, behind which they are slightly separated, the 

 inner margins being feebly sinuous. The form of labrum and mandi- 

 bles preeminently distinguishes the genus. 



I have seen in the cabinet of the British Museum several species 

 of very large size from China and the East Indies with this form of 

 mandible which should probably be placed in this genus. I might 

 here mention another curious form in the same Museum, allied to 

 Fi/rota but the labrum is long, rhomboidal, truncate in front, con- 

 cealing the parts of the mouth beneath; mandibles stout, directly 

 opposed, margin crenulate and with the outer face grooved. The 

 antennae are strongly flattened in the male and resemble those of 

 certain Elateridae. 



The form of the first antennal joint of G nathospasta points to an 

 affinity with Macrohasis. 



a. mimetica, n. sp. — Elongate, black, moderately densely clothed with 

 rather coarse, recumbent, cinereous hairs. Antennae black. Head ratiier large 

 coarsely and moderately densely punctured. Thorax smaller than the head, 

 sides at apical third rapidly converging, posteriorly gradually narrowing to 

 base, median line feeble, disc moderately densely and coarsely punctured. 

 Elytra at base scarcely wider than the head, gradually broader posteriorly, 



