REVISION OF THE CICINDELZ OF THE UNITED STATES. 33 
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the apex; such have not occurred to me; immaculate varieties are mentioned, but they 
are only greasy specimens, in which vestiges of the spot can always be traced. 
GROUP III. 
Species having the upper surface sericeous, the body rather flattened, and the thorax 
trapezoidal, usually short, and almost margined. The head is glabrous, the vertex is 
broadly excavated, the front is suddenly declivous anteriorly, and finely striate. The la- 
brum is large, prominent, sometimes black (in foreign species,) and one-toothed. The 
markings of the elytra are variable, but the terminal part of the apical lunule is always 
wanting, the apex is not serrate and but slightly separately rounded. The palpi are black 
in both sexes: the second and third joints of the anterior tarsi of the male are slightly 
oblique. The body is hairy beneath on the sides; in other respects this group agrees with 
the preceding. 
The species, which with one exception are foreign, may be divided as follows: 
Labrum black, carinated, elytra punctured and foveate. C. fasciato-punctata, &. 
Labrum white, subcarinate. 
Black, elytra more densely punctured, hardly margined. C. longilabris. 
Green, elytra flattened, margined. C. ismenia, rotundicollis. 
5. C. longilabris, purpureo-nigra, supra eeneo tincta, labro albo magno, antice rotundato, obtuse dentato, lateri- 
bus sinuato, thorace latitudine fere duplo breviore, trapezoideo, confertim rugoso, impressionibus profundis, elytris 
confertim minus profunde punctatis versus suturam vage seriatim foveatis, gutta humerali, altera ad quadrantem, 
fascia media sinuata obtuse deflexa, guttaque ad dodrantem albis; subtus cyanea, lateribus parce albo-pilosis. Long. 
-5d5— 64. 
Variat elytrorum maculis plus minusve deficientibus. 
a. Supra, nigra immaculata, (thorace postice minus angustato.) 
Say, Long’s Expedition to St. Peter’s River, 2, 268. Lec. Ann. Lye. Nat. Hist. 4, 178. 
C. albilabris Kirby, Fauna Bor. Am. 4, 12; tab. 1, fig. 1. 
New Hampshire, Canada, Mackinaw, Lake Superior; inhabits paths through grassy 
and bushy places, and takes refuge in the herbage when disturbed. The form (z) is a 
female from the North shore of Lake Superior, of a pure black colour above, and broader 
form than usual; the thorax is less narrowed posteriorly. 
GROUP IV. 
Robust species with convex elytra and thorax, the latter (not much wider than its 
length, rounded on the sides, hardly rugose, not granulate; front deeply striate sparsely 
setose, or sparsely finely striate and glabrous. Labrum short, 3-toothed. Palpi of both 
sexes entirely black. Elytra indistinctly punctured, with a row of small shallow fovex 
near the suture, conjointly broadly rounded at tip, not serrate, spots always marginal, 
usually small and disconnected, (except in some varieties of C, Lecontei,) and frequently 
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