276 PHYTOPHAGA.—SUPPLEMENT. 
After carefully studying Dr. Horn’s description of D. crenicollis (Say) (Trans. Am. 
Ent. Soc. xvi. p. 204), I must conclude that the specimens formerly referred by me to 
that species, and many others since obtained at Teapa and elsewhere in Mexico, repre- 
sent yet another closely-allied form. They differ from D. crenicollis, as defined by 
Dr. Horn, in having the black discoidal stripe of the elytra always narrower than the 
preceding yellow space, and in the abdomen not being densely punctured, the latter 
thickly clothed with silvery pubescence. It may be remarked here that Say’s descrip- 
tion was based upon Mexican specimens, and Dr. Horn’s upon examples from the 
United States. In D. horni the thorax usually has two small black spots on the middle 
of the disc; but these spots are not present in the specimens from Orizaba. D. caro- 
liniana (Fabr.) is another allied species ; but it is described by Dr. Horn as having a 
pale labrum, a closely punctured abdomen, and yellow legs, the latter with the tips 
of the tibiz only piceous. 
27. Disonycha quinquevittata. 
Altica 5-vitiata, Say, Journ. Acad. Phil. iv. p. 85 (1824) '; Complete Writings, ii. p. 227. 
Disonycha quinquevittata, Horn, Trans. Am. Ent. Soc. xvi. pp. 203, 315 (1889) *. 
Disonycha capitata, huj. op. p. 316. 
To the localities given, add:—Norta America}, the entire region west of the 
Mississippi River from the northern boundary of the United States to Mexico 2. 
31. Disonycha limbata. 
Black; the head rugosely punctured; the thorax pale fulvous, closely punctured ; elytra flavous, narrowly 
margined with black, almost imperceptibly punctured. 
Length 3 lines, 
Of proportionately convex shape; the head rugosely punctured, black, with some obscure flavous spots, the 
punctures on the vertex interrupted by a narrow smooth central space ; antenne short and robust, black ; 
thorax transversely convex, the sides strongly rounded, the posterior angles oblique, the disc finely and 
rather closely punctured ; scutellum broad, black ; elytra pale flavous, very minutely punctured, the basal, 
sutural, and lateral margins narrowly black ; underside and legs black, the sides of the breast and of the 
abdomen pale fulvous. 
Hab. Mexico, Ciudad in Durango (Forrer). 
A single example. Quite distinct from any of its congeners by the rugosely punc- 
tured head, the colour of the elytra, and the convex shape. 
ORODES. (To follow the genus Disonycha, p. 318.) 
Body elongate; palpi slender; antenne very long, slender, filiform ; thorax transverse, with a very shallow 
transverse groove near the base; elytra punctured in rows; tibiee simple, the posterior pair mucronate ; 
the first joint of the posterior tarsi as long as the following three joints together; claws appendiculate ; 
prosternum narrowly elongate, flattened ; anterior coxal cavities open. 
The single species for which this new generic name is proposed seems to be a 
transitionary form between Disonycha, Systena, and Calliphron, differing from each of 
