CEDIONYCHIS. . 317 
(dionychis acutangula (p. 409). 
To the localities given, add:—Mexico, Ventanas in Durango, Acapulco (Hége), 
Chilpancingo, Dos Arroyos, Acaguizotla, and Mescala, all in Guerrero (H. H. Smith). 
(idionychis frontalis (p. 410). 
To the localities given, add :—Mexico, Amula and Xucumanatlan, both in Guerrero 
(1. H. Smith). 
The Mexican specimens differ from those from Guatemala in the rather larger 
amount of fulvous on the head, and by the thorax having three very obscure piceous 
spots placed triangularly on the disc. 
6 (a). Gédionychis clypeata. 
Fulvous, the antenne and tibia more or less piceous, the head (the clypeus excepted) dark blue; thorax 
impunctate ; elytra metallic dark blue, violet, or greenish, very finely and rather closely punctured, 
Length 22-3 lines. 
Of ovate, medially rather widened shape ; the head impunctate, except for a few punctures near the eyes, dark 
metallic blue; the clypeus raised, forming an acute transverse ridge, pale fulvous ; antenne long and 
slender, piceous or black, the basal three joints more or less pale; thorax strongly transverse, the sides 
greatly rounded and with a broad flattened margin, the anterior angles but slightly dentiform, the surface 
impunctate; scutellum variable in colour; elytra with a shallow depression below the base, very finely 
but not very closely punctured; underside and legs fulvous, the tibie black or piceous, the posterior pair 
sometimes fulvous; prosternum rather strongly longitudinally raised. 
Hab. Mexico, Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith), Tacambaro in 
Michoacan, Tapachula in Chiapas (Hége). 
Closely allied to @. frontalis, but with the head almost impunctate, the thorax with 
much more strongly rounded sides, and the elytra more finely and less closely punc- 
tured. Many specimens. 
(dionychis lateralis (p. 412 ). 
To the Mexican localities given, add -—_Ventanas i in Durango, Cuernavaca in Morelos 
(Hoge), Tierra Colorada in Guerrero (H. H. Smith). 
19 (a). Gdionychis emula. 
CEdionychis emula, Horn, Trans. Am. Ent. Soc. xvi. p. 185, t. 5. fig. 7 (1889) '. 
~ Hab. Nortu America, Arizona !:—Mexico, Northern Sonora (Morrison). 
A single specimen obtained by Mr. Morrison agrees in every respect with Dr. Horn’s 
description and figure, except that it has the third antennal joint shorter than the 
fourth. instead of longer, as stated by that author. : 
19(s). @dionychis tenuilineata. 
Cdionychis tenuilineata, Horn, Trans. Am. Ent. Soc. xvi. p. 186 (1889) °. 
_ Hab. Norra America, Southern Arizona 1.—Mexico, Acapulco (Hége). 
