48 MADEIRAN COLEOPTERA. 
any of the other islands of the Group (the 7’. Lowet being found both 
in Madeira and Porto Santo). It was discovered by myself amongst 
the rocks on the lofty and almost inaccessible promontory to the 
north of Porto Santo, immediately over the extreme summit of the 
Pico Branco,—on the 9th of May 1855. 
137. Tarphius brevicollis. 
Tarphius brevicollis, Woll., Ins. Mad. 144 (1854). 
Inhabits the sylvan districts of Madeira proper, in company with 
the other Tarphi. Very rare. 
138. Tarphius rugosus. 
Tarphius rugosus, Woll., Ins, Mad. 144 (1854). 
Inhabits the sylvan districts of Madeira proper. Exceedingly rare. 
139. Tarphius explicatus, n. sp. 
T. quadrato-oblongus fusco-niger, prothorace rugoso amplissimo, 
ante medium valde dilatato explicato, postice angustato, granulis 
dispersis obsito, in disco late canaliculato, elytris concoloribus, 
rugose subseriatim granulatis, interstitiis alternis elevatis inter- 
ruptis, nodos septem magnos exstantes in singulo sitos formantibus. 
Long. corp. lin. 21-25. 
T.. quadrate-oblong, deep piceous-black, and covered with short rusty- 
brown sete and scales, quite opake. Head and prothorax very 
rough, and beset with granules and sete: the latter with a wide 
and deep channel on its disk; exceedingly large, and immensely 
dilated. about the middle, being much rounded anteriorly, but a 
good deal (and rather suddenly) narrowed behind ; the sides very 
broadly flattened-out (or, as it were, unfolded) and recurved; and 
the hinder margin greatly sinuated, causing the posterior angles 
to appear produced. Hlytra concolorous, and with the sides almost 
parallel, being but very slightly broader at the extreme base than 
elsewhere ; exceedingly rough, and densely crowded with granules, 
short seta, and scales; the alternate interstices raised and inter- 
rupted, forming seven very large and well-marked nodules, in the 
usual positions, on each elytron. Femora and tibie rufo-ferru- 
ginous: the antenne and tarsi a little paler. 
The largest of the Madeiran Tarphii, as yet detected, and of a 
most éxtraordinary appearance,—its quadrate-oblong outline and im- 
mensely developed prothorax (the sides of which are greatly flat- 
tened-out, and rounded, in front), in conjunction with its densely 
scaly and roughened surface, and the seven well-defined, much-ele- 
vated nodules with which each of its elytra are furnished, giving it 
