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(EDIONYCHIS. 411 



like a species of Disonycha, and the abdominal segments are entirely black ; the colour 

 of the upperside is very variable, and either metallic or entirely opaque ; but as I cannot 

 find any other differences whatever, I must conclude all these forms to represent the 

 same species. In Mr. Baly's collection the same species is labelled (E. arctica, Baly, 

 with the locality " Arctic America," but I cannot find any species published under this 

 name. (E. concinna, Fabr., seems also very closely allied, but differs in the fulvous 

 colour of some of the abdominal segments ; (E. violascens, Leconte, from Fort Tejon, 

 is again closely allied, but is described as having closely and distinctly punctured elytra, 



9. (Edionychis semipurpurea. 



Bluish-black ; head and thorax greenish, the former rugosely, the latter finely, punctured ; elytra punctured 

 like the thorax, the disc cupreous, the lateral margin purplish. 



Length 3 lines. 



Head strongly rugose, leaving only a small central space smooth and impunctate ; antennae short, of the same 

 shape as in CE. modesta ; thorax also as in (E. modesta, but the surface entirely covered with small and large 

 punctures ; scutellum broader than long ; elytra entirely punctured like the thorax, the punctuation some- 

 what stronger at the sides than at the disc, the latter of a brownish-cupreous colour, the lateral margin 

 bluish or purplish, this colour widening greatly towards the apex. 



Hah. Mexico, Chalchicomula (Salle). A single specimen. 



(E. semipurpurea so much resembles in its general shape (E. modesta, that I am. 

 inclined to regard it as another variety of the latter; but the much more strongly 

 and rugosely punctured head and the very close and distinct punctuation of the upper 

 surface differs from the sculpturing of (E. modesta, in which the elytra are scarcely 

 visibly punctured. 



10. (Edionychis dugesi. (Tab. XXIV. fig. 12.) 



Fulvous; base of the head, antennae, anterior legs, and the breast, black; thorax fulvous, with five spots; 

 elytra green or blue, subopaque, minutely punctured, the lateral margin narrowly fulvous. 



Length 3 lines. 



Head rugosely punctured near the eyes, its base greenish black, a frontal patch and the clypeus flavous j 

 antennae short, scarcely extending beyond the first third of the elytra, the joints rather robust and short ; 

 thorax narrow, the sides slightly rounded, narrowly flattened, the anterior angles thickened but scarcely 

 produced, the surface very minutely punctured (when seen under a strong lens), fulvous, with five black 

 spots (2, 3) placed transversely ; scutellum black ; elytra not more strongly punctured than the thorax, 

 rather opaque, greenish or bluish, the extreme lateral margin and their epipleurae reddish fulvous ; 

 posterior femora reddish fulvous, the rest of the legs and the breast black ; abdomen testaceous at the 

 sides. 



Bab. Mexico, Silao (Salle). 



The two specimens before me do not differ from each other ; (E. dugesi may be known 

 from (E.fiavocyanea, Crotch, and a few other similarly coloured species, by the fulvous 

 middle portion of the head, the five-spotted thorax, and the colour of the underside. 



11. (Edionychis purulensis. (Tab. XXIV. fig. 3.) 



JTulvous ; head and antennae black ; thorax flavous ; elytra finely punctured, violaceous blue, the extreme 



apices fulvous ; tibiae and tarsi piceous. 

 Length 3-3| lines. 



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