536 SUPPLEMENT 



Lucanidae, such as Rbyosonatus, PhoHdotus, &c. We may 

 likewise notice the transverse and slightly emarginated upper 

 lip, the extreme woolliness of the transverse mentum (as in 

 Pholidotus), and the non-sexertion of the laciniae of the lower 



" It will be perceived that the eyes are reniform, as in the 

 Prionidas; instead of each being separated, and having the 

 appearance of four eyes, as in the Lucanidae. 



" The clothing of down upon almost every part of the in- 

 sect, the form of the scutellum, and the deeply emarginate 

 terminal joint of the abdomen, or its under side, also deserve 

 notice. 



" Next to the antennae, the tarsi may be considered as the 

 most singular portions of the animal in question, not only 

 from their being heteromerous, but also from the peculiar 

 structure of the joints. These at first sight appear perfectly 

 cylindric, as in the Lucanidae, but on being more closely 

 examined they are found to be slightly clothed with very fine 

 short bristles , so as immediately to suggest the idea of an 

 attempt to clothe them with the soft cushion with which the 

 tarsi of the Prionidae are furnished. 



" Between the claws there is a very small coriaceous appen- 

 dage, but without the additional minute pair of claws of the 

 Lucanideous tarsi." 



To the family of Passalidae we add a new genus, under the 

 name of Heocaphyllum — the antennae with six laminae ; the 

 mandibles nearly as long as the thorax, compressed, curved, 

 with two external dentations near the middle. The maxil- 

 lary palpi nearly as long as the mandibles, cylindrical ; the 

 head short, transverse, partly hid by the thorax ; the eyes 

 large, projecting ; the thorax large, broader than the body, 

 projecting anteriorly in the middle. The body broad, and 

 shorter tlian the true Passali. The species we have named 

 Bmsiliensis. It is piceous black, with the antennae reddish. 



