(EDIONYCHIS. 41T 



nation, the specific value of these most variable insects is difficult to settle, but an 

 accurate description of differences to be noticed in even the single individuals will 

 assist later for their proper classification when the amount of variation is better 

 understood. 



25. (Edionychis infirma. (Tab. XXIII. fig. 10.) 



Elongate, pale flavous ; antennae (the first two joints excepted) black ; head and thorax impnnctate ; elytra 

 very finely punctured, the lateral margin, a broad subsutural, and a narrow discoidal longitudinal band, 

 pale ferrugineous. 



Length 4-4| lines. 



Head with a few very fine punctures near the eyes, the latter widely separated, the rest of the surface impunc- 

 tate, the frontal elevations very obsolete ; antennae extending to half the length of the elytra, black, the 

 first two joints fulvous, the third and fourth joints of equal length ; thorax not much more than twice as 

 broad as long, the sides rather regularly rounded, flattened, and bounded inwards by a deep groove, the 

 anterior angles thickened, produced in front, but without any trace of a tooth, the posterior margin some- 

 what rounded, the surface impunctate ; scutellum flavous ; elytra with two yellowish-brown bands, which 

 are abbreviated anteriorly and posteriorly, but join at their posterior ends, the first band, placed close to 

 the suture, is double the width of the second, which is placed at the middle of the disc, the lateral margin 

 is of a similar colour to, and of the same width as, the second band ; the underside and legs flavous, or 

 the latter fulvous, the extreme apices of the tibise and the tarsi piceous. 



Hdb. Mexico, Cerro de Plumas, Jalapa (H'dge), Juquila (Salle). 



Allied in shape and pattern to (E. umbratica, Oliv., (E. 4:-vittata 9 Baly, and (E. incon- 

 stans, Harold. From the two first this species is distinguished by having two (instead 

 of one) elytral bands, which are also differently placed and shaped ; and from (E. incon- 

 stans by the pale colour of the head and body, the want of the sutural band, and the 

 finer punctuation of the elytra, as well as by the black antennee. The elytral bands in 

 some specimens are nearly obsolete. 



26. (Edionychis inconspicua. 



Elongate, pale testaceous ; antennas, the scutellum, the outside of the tibiae, and the tarsi, black ; head distinctly 

 punctured ; thorax impunctate ; elytra very finely punctured, testaceous, sometimes with narrow longi- 

 tudinal whitish stripes. 



Length 4 lines. 



Eab. Mexico, Ventanas, Ciudad in Durango (Forrer). 



Of the same shape as the preceding species, but differing in the very distinctly punc- 

 tured head, the frontal elevations well raised and bounded behind by a transverse deep 

 groove, the black and shorter antennae, and the black scutellum, as well as by the colour 

 of the outer side of the tibiae, which is also black. The thorax has the anterior angles 

 produced into a short tooth, which is not the case in (E. infirma, and elytral bands are 

 altogether absent. 



27. (Edionychis longicollis. (Tab. XXIV. fig. 20.) 



Elongate, pale testaceous ; antennae (the three basal joints excepted), the outside of the tibise, and the tarsi, 

 biol. CENTE.-AMEK., Coleopt., Vol. VI. Pt. 1, January 1886. 3 h 



