220 MR. WESTWOOD ON THE TENEBRIONID^ 



belonging to the genus Praugena of Laporte, but Laporte gives the Senegal insect under 

 the genus Odontopus. 



Metallonotus, G. R. Gray. 



This is another tropical African form which comes very close to Odontopus, especially 

 in the dilated form of the elytra, the denticulated margins of the prothorax and the 

 metallic colouring; it differs, however, in having the 8th, 9th and 10th joints of the 

 antennffi rather longer than the preceding and of equal size, and the 11th larger and 

 longer, with the apex oblique ; the prothorax is channeled down the middle ; the elytra 

 are considerably broader and more gibbose than in Odontopus ; the femora are simple ; 

 the tibiae long and rather slender, bent in the middle, and with the tips rather incurved. 

 The type, Metallonotus denticollis, Gray (in Griff. An. K. Ins. pi. 80. fig. 4 ; called 

 Lagria gihbosus in pi. 74. fig. 4, and in part xxxiv. p. 789, and Lagria metallonotus in 

 partxxxi. p. 34), inhabits Sierra Leone ; the head, thorax and legs are of shining green, 

 and the elytra golden green with irregular punctures, misrepresented by the engraver of 

 my drawing in plate 80 as arranged in striae. The unique specimen is in the collection 

 of Mr. Hope. 



Pr^ugena, Laporte, Hist. Nat. Ins. Col. 



This new genus is characterized by its fihform antennae, with the last joint evidently 

 longer than the preceding, the body oval, slightly depressed and rather elongated, the 

 thorax transverse with the sides rounded, the elytra rather broad at the base and gra- 

 dually narrowed to the tip. It is composed of tropical African species, namely : — 



PrcBugena rubripes, Laporte : Senegal. 



Pr. carbonaria [Helops carb., Klug, Ins. in Erman's Reise, p. 40. no. 1 19). 



Pr. marginata {Helops marg., Fabr. Ent. Syst. i. 118, and Syst. El. i. 157, and Klug 

 in Erman's Reise, p. 40, no. 117.), Guinea, according to Fabricius. 



Obs. — Helops marginatus, Fabr. Ent. Syst. iv. 440, is a distinct species ; its name was 

 accordingly altered by Fabricius in Syst. El. i. 161. to H. striatus, an equaOy unfortunate 

 name, which has been applied to three other species of Helops, namely to Helops violaceus, 

 F., given by Olivier and Herbst as Tenebrio striatus ; to Helops caraboides,Fz. (nee Linn., 

 Fab.) by Olivier as Helops striatus ; and to the Helops gibbulus of Schonherr by Four- 

 croy. The Fabrician marginatus or striatus is said to be a native of the Cape of Good 

 Hope in the ' Ent. Syst.,' but Mr. Hope (Col. Man. iii. p. 75) gives it as a native of 

 Guinea, and as belonging to the genus Eurynotus of Kirby. 



Mr. Hope also gives the Helops quadripustulatus (Fabr. Syst. El. i. 158), which is a 

 native of Guinea, as a Praugena. 



The following are the remaining species of Tenebrio and Helops, described, from tropical 

 Western Africa, by Fabricius, which have not been noticed in the preceding observations: 



Helops variegatus. Fab. Ent. Syst. i. 112, Syst. El. i. p. 158, described from the 



