30 MADEIRAN COLEOPTERA. 
side of the dorsal region ; and unequally impressed towards either 
anterior angle (which is a little paler than the rest of the pro- 
notum). Hlytra rather acuminated posteriorly, and widest about 
the middle, being a little less expanded than in the last species ; 
paler and less metallic than the head and prothorax, and just 
perceptibly ornamented with broken fascie or bands (which are 
comparatively distinct when the specimens are pale and immature, 
but which in darker examples are occasionally so fused into each 
other as to be scarcely traceable); less coarsely punctate-striated 
than the O. rugulosus, and more evidently pubescent,—the pubes- 
cence moreover having a tendency to be disposed in longitudinal 
rows. Jimbs as in the last species, but a trifle shorter perhaps 
and somewhat paler. 
Differs from the O. marinus in being more rounded at the shoulders 
and acuminated behind; in its prothorax being altogether wider, and 
much more filled-in with a membranous margin towards its hinder 
angles; in its head and prothorax being less shining, and much 
more coarselyand densely granulated; and in its elytra being distinctly 
pubescent, and generally pretty evidently mottled with darker, 
clouded spots, or interrupted bands,—after the ordinary fashion of 
the Helophori. The species was found in Porto Santo, in company 
with the two preceding ones. 
Genus 32. CALOBIUS. 
Wollaston, Ins. Mad. 92. tab. ii. f. 7 (1854). 
84. Calobius Heeri. 
Calobius Heeri, Woll., Ins. Mad. 92. tab. ii. f. 7 (1854). 
Inhabits Madeira and Porto Santo, occurring amongst marine Con- 
ferve in pools of unadulterated sea-water left by the tide on the 
rocks. The specimens from Porto Santo (where I detected it during 
April of 1855) are, on the average, decidedly larger, and somewhat 
more brassy, than those from Madeira: such examples I would 
regard as the var. /. 
Genus 33. LIMNEBIUS. 
Leach, Zool. Miscell. iii. 93 (1817). 
85. Limnebius grandicollis. 
Limnebius grandicollis, Woll., Ins. Mad. 94 (1854). 
Inhabits Madeira proper, occurring in the small streams and pools 
of a lofty elevation. 
