a2 Mr. J. O. Westwood on the 
Caput latius, angulis anticis clypei rotundatis marginatis, punc- 
tatissimum, impressione verticali anticé tuberculis duobus 
minutis terminata. Mentum basi truncatum. Antenne dis- 
tincté 10-articulate. Prothorax transversus, niger, nitidus, 
punctatus, punctis in parte postica majoribus, et magis 
distantibus, medio lined longitudinali impressé. Prosternum 
anticé porrectum, margine antico fere recto. Elytra nigra, 
nitida, punctis magnis irregularibus, sutura striisque 4 in 
singulo elytro parum elevatis et levibus. 
This species is named C. paradoxus in most cabinets, but is at 
once distinguished by the shape of the mentum and basal joint of 
the antennz. Cryptodus paradoxus differs from the above in its 
smaller size, being scarcely nine lines long; in being of a more 
pitchy brown hue; in being less depressed ; in having the head 
squarer, and not so broad; in the two vertical tubercles being more 
prominent ; in the mentum being deeply emarginate at its base, 
to receive the rounded front of the prosternum; in the 9-jointed 
antennez, with the basal joint much more dilated ; in having the 
prothorax not so transverse, and much more closely punctured ; 
in the elytra being scarcely dilated behind, and shorter ; and in 
being covered with exceedingly minute punctures, in addition to 
the irregular larger ones, —which, however, are neither so large 
nor so distinct as in my species. 
Note.—The insect which I have here regarded as the true 
C. paradoxus agrees with Mac Leay’s figures in the 
form of its mentum and basal joint of the antenne, and 
number of joints in the latter organs. It is true that 
Mac Leay describes the colour of his species as being 
ater,” which ill accords with any of the specimens I 
have seen in the Collections of the British Museum and 
Mr. Hope; beyond this it is impossible, from Mr. Mac 
Leay’s description, to determine the species. Indeed 
Dr. Burmeister informs me that there is a large black 
species (16 lines long) in the Berlin Museum, which also 
accords with Mac Leay’s description, and he has accord- 
ingly given the name of Variolosus to the species which 
I have regarded as the true Paradozus. In the British 
Museum Collection my new species is labelled Para- 
doxus, (which it certainly is not,) and the species I have 
supposed to be that insect is named Variolosus. 
I now proceed to the descriptions of several insects, which 
appear to me to prove that Cryptodus is referable to the family 
Dynastide, to which they belong. 
