CETONIIN/E 295 



expanding from base to apex and in its least developed stage not 

 less than parallel; it is also probable that the typical aurantiaca 

 has a densely metallic abdomen, while in arizonica it is constantly 

 testaceous, with thin metallic gloss; this latter coloration is specific 

 in nature, as shown by its absolute constancy in ample series at 

 hand, though disregarded by Mr. Bates as a casual abnormality. 

 Similarly, it seemed possible that the species named texana above 

 might be the same as robusta Bates, described as from Sonora, but 

 the very feeble nubilous greenish tint gradually appearing toward 

 the elytral suture in texana, could not be referred to as a "plaga," 

 which indicates something sharply defined, as it is in obliqiia and 

 all its related forms; besides this, the lateral bead of the pronotum 

 is decidedly still broader basally in texana than in obliqua, or any of 

 its subspecies. 



The following are some additional Gymnetids, which seem to be 

 hitherto undescribed: 







*Amithao sparsus n. sp. Form oblong, parallel, depressed and intense 

 opaque velvety black above, sparsely and evenly sprinkled throughout, 

 as well as on the head and pygidium, with minute white points, which 

 have in general a somewhat serial arrangement on the elytra; under 

 surface and legs deep shining black, all except the median parts, tibiae 

 and tarsi, sprinkled with spots of whitish tomentum, slightly less minute 

 than those of the upper surface; head in general structure, impression 

 and form of the clypeus, exactly as in albopictus, except that the punctures 

 are smaller, shallow and each filled with a small spot of pale tomentum, 

 the erect hairs much shorter and more slender and the sinus of the clypeal 

 apex narrower and shallower; prothorax wider than long, though barely 

 more than two-thirds as wide as the elytra, the converging sides obtusely 

 angulate at about the middle, the fine and evenly distributed white 

 points each completely filling a very shallow puncture; elytra with pe- 

 culiarly parallel and nearly straight sides from base to the abruptly 

 rounded external angles, the apex broadly and very obtusely rounded; 

 small tomentose specks evenly distributed but of various forms, some 

 slightly elongate, seriate in a little more than inner half, confused thence 

 to the sides; pygidium extremely densely scabrous and dull, with short 

 sparse erect black hairs and small whitish spots of tomentum throughout; 

 under surface, except medially, rather coarsely punctured but at all deeply 

 only on the sterna, each puncture filled with tomentum; hind tarsi (c 71 ) 

 scarcely three-fourths as long as the tibiae, the anterior tibiae slender, 

 edentate, the terminal process moderate, acute. Length (cf) 22.8 mm.; 

 width 1 1. 8 mm. Panama (Culebra Cut), Gaillard. 



This species is very different from any other known to me because 

 of the very opaque velvety-black surface, evenly sprinkled through- 



