180 MANDIBULATA. COLEOPTERA. 



Sp. 1. vulgaris. Niger, thorace antics tricorni, medio breviori, lateralibus por- 

 rectis elongatis, elytris striatis: fcemina, thorace submutico. (Long. corp. 

 5—10 lin.) 



Sc. Typhosus. Linne.—Ty. vulgaris. Samouelle, pi \.f. l.—Steph. Catal. 106. 

 No. 1104. 



Entirely black, shining: head depressed, villose at the sides: clypeus angulated, 

 margined, with a longitudinal elevated ridge : thorax smooth in the middle, 

 with the sides punctated and foveolated, the male with two porrect acute 

 horns at the anterior angle, reaching over, and as long as, the head, and an 

 intermediate shorter ascending one in the middle: elytra striated: female 

 with the lateral horn on the thorax very short, and in place of the central one 

 a transverse elongate ridge. 



Very variable in size and in the length of the thoracic horns, as well as in sculp- 

 ture and colour. In some examples the lateral horns in the male are con- 

 siderably longer than the head, and have a distinct tooth above ; while others are 

 nearly obliterated and perfectly simple : some examples have the sides of the 

 thorax very rugose; while others are simply punctate: others again have the 

 elytra castaneous and rather deeply sulcate : but as all intermediate shades 

 occur, they must all be considered as belonging to one species. 



Taken most commonly on heaths and commons within the metro- 

 politan district, in April and May, and found in numbers lying 

 dead about the end of June or July. " Far from common in 

 Cambridgeshire.'" — Rev. L. Jenyns. " Hill-ends, Cardevv Nock, 

 &c." — T. C. Heysham, Esq. " Stockton Common near York, 

 burrowing in sand." — W. C. Hewitson, Esq. " Lundy Island." — 

 G. Waring, Esq. " Epping."" — Mr. Doubleday. 



Genus CXCV. — Geotrupes, Latreille. 



Antennae rather slender, basal joint long, triangular, slightly pilose; second 

 short, globose ; third elongate ; fourth shorter than the fifth, which is slightly 

 elongate; the three following transverse, cupshaped; the remainder forming 

 an oval trilamellate club. Palpi maxillary with the third and fourth joints of 

 equal length, the latter cylindric: head triangular: clypeus rhomboidal : thorax 

 broad, convex, unarmed : elytra large, oval : body convex, robust : legs stout : 

 femora short, sometimes spinose : tibia? curved, more or less compressed, the 

 anterior dentated externally, the others notched: tarsi with the basal joint 

 shortest. 



Latreille — than whom no one is more competent to decide upon 

 a point relative to the structure of insects, and " whose accuracy 

 is beyond all praise" in the details thereof, but who is not in- 



