20 



Pachypus, Dej. — Geotrupes, Meloloktha, Fah. 



The antennae of the males are composed of bvit eight joints, of 

 which the five last form the club. The mandibles are in the form of 

 very thin, triangular, elongated leaflets, and are entirely concealed, 

 as is also the labrum. Tlie terminal lobe of the maxillae is very 

 small, scarcely distinct, and without teeth. The mentum is ex- 

 tremely prominent, projects forwards, and is roimded on the summit. 

 The terminal joint of the pLilpi is the longest of all, and nearly cylin- 

 drical. 



The body is thick, the epistoma semicircular, concave above, and 

 distinguished posteriorly from the vertex liy a transverse carina. The 

 thorax of the males is excavated and armed anteriorly with a horn ; 

 the four posterior tibiae are strong, deeply incised transversely, with 

 their extremity widened and crowned with a range of little spines ; 

 the spurs are large. The tarsi are long, slender, pilose, and termi- 

 nated by two small equal and simple hooks. 



With the exception of the antennae and the form of the epistoma, 

 this subgenus approximates much nearer to Oryctes than to Melo- 

 lontha *. 



Amblyteres, Mac Leay. 



The antennae consist of ten joints, the three last forming the club. 

 The labrum is exposed and lobate. The mandil)]es are strong and 

 scaly. The maxillary lobe is of a moderate size, and its inner side 

 armed with corneous teeth. The middle of the superior extremity of 

 the mentum is slightly prolonged and truncated, the angles rounded 

 and bearing the palpi ; their last joint is ovoid, the same of the max- 

 illae is much elongated and very cylindrical. The scutellum is large f . 



In the other subgenera of the same division, the mentiam forms a 

 transverse square, the middle of the superior margin projecting in 

 the manner of a tooth, entire or emarginated. The maxillae are en- 

 tirely corneous and resemble mandibles terminated by a stout, in- 

 clined, elongated tooth, either entire and very obtuse at the end, or 

 divided there into two or three points. The mandibles are always 

 scaly and robust. The labrum is exposed. 



Some, peculiar to Australia, have a sternal point ; their tarsial 

 crotchets are entire and unequal. Such is the 



Anoplognathus, Repsimus, Leach, 

 The antennae are composed of ten joints, and the extremity of the 



* Geotrupes excavatus, Fab., the male; Melolontha cornuta, Oliv,, Col., I, 5, vii, 

 ?4, a, b, tbe male ; Scarab, candidce, Petag., Insect. Calab., I, 6, a, b, the male ; a 

 black variety also, observed in Corsica by M. Peyrandeau, and subsequently in Sicily 

 by M. Lefe-STe ; — M. atriplius, Fab., a female of another species. 



f Mac Leay, Hor. Entom., I, p. 142. This gentleman says nothing about the 

 crotchets of the tarsi, nor sexual differences. From the description of the species 

 which is the type of the genus, the thorax must be destitute of horns, and the ante- 

 rior tibise are tridcndate on the outer side ; but two teeth are found iu the same of 

 Pachypus. 



