of the Australian Lamellicorn Genus Cryptodus. 5 



terminal joint produced into a point beneath the ungues, which 

 are unequal in size, the larger one being much bent, and armed 

 with a strong tooth near its base. 



Sp. 6. Cryptodus Passaloides, Germ. (PI. I. fig. 5.) 



" C. mento basi emarginato, antennis distincte lO-articulatis, 

 nigro-piceus, thorace acervatim grosse punctato, lateribus 

 antrorsum angustato ; elytris planis grosse punctatis, piinctis 

 in disco seriatis." Germar. 



Long. Corp. lin. 10. 



Habitat in Australia, Adelaida, Wilson. Mus. Westwood. 



Cryptodus Passaloides, Germar, in Linn. Ent. iii. p. 189. 



Differs from C. Tasmann'ianus in its narrower from and dark 

 chesnut colour, in the more deeply punctured prothorax, and in 

 the mentum being emarginate at the base. The following is Ger- 

 mar's detailed description of the species : — Caput longitudine 

 parum latins, confertim punctatum, vertice tubercnlis duobus ob- 

 longis divaricatis, antice rotundatum, marginatum. Antennae 

 piceae, articulo Imo trigono, funiculo 6-articulato clava triphylla. 

 Mentum trapezoidale punctatum, basi profunde emarginatum. 

 Thorax postice longitudine duplo latior, margine antico longitu- 

 dine vix latior, lateribus a basi ad medium fere parallelis, a medio 

 ad apicem rotundato-angnstatis, tenuiter marginatis punctis magiiis 

 impressis pro parte raris remotis, pro parte magis acervatisobsitus, 

 medio late sed obsolete canalicul'atus. Prosternuin antico pro- 

 ductum, impressum, punctatum, apice subtruncatum. Elytra 

 thorace ter longiora, deplanata, profunde punctata, punctis dorsi 

 majoribus seriatis, linea circulari impressa signatis ; laterum cre- 

 brioribus inordinatis. Corpus subtus magis piceum, minus dense 

 punctatum. 



The specimen represented in the accompanying figure was sent 

 to me from Adelaide by C, VV. Wilson, Esq. ; it is of a rich glossy 

 dark chesnut colour. J'he two tubercles on the crown of the head 

 are slightly defined ; the tarsi are simple ; the basal joint of the 

 antennae is gradually widened from the base to the extremity, 

 which is obliquely subtruncate ; the mentum has the sides strongly 

 deflexed, the middle of the disc very slightly depressed, and the 

 base divided into two acute points, with a semi-circular incision 

 between them. A specimen in the Hopean Collection, from Swan 

 River, is somewhat larger and broader than my specimen, but 

 otherwise agrees with it. 



