COLEOPTERA, 443 



Sometimes the antennae insensibly enlarge towards the extremity, 

 or gradually terminate in a club ; the intermediate joints, from the 

 third, are nearly in the form of a reversed cone ; the two or four 

 penultimate joints form reversed triangles, and the last is ovoid. 



Thanasimus, Lat, — Clerus, Fab. 



The maxillary palpi filiform ; last joint of those attached to the 

 labium large and securiform *. 



Opilo, Lat. — NoToxus, Fab. 



The four palpi terminated by a large securiform joint f. 

 Sometimes the three last joints of the antennae are much wider 

 than the preceding ones, suddenly forming a club, either simple and 

 in the form of a reversed triangle, or serrated. 



Those, in which this club is simple or not serrated, form two sub- 

 genera. 



Clerus, Geoff. — Trichodes, Fab. 



The maxillary palpi of these Cleri, properly so called, are termi- 

 nated by a compressed joint in the form of a reversed triangle ; the 

 last of those that belong to the labivmi, Avhich are larger than the 

 others, is securiform. The antcnnal club is hardly longer than wide, 

 and is composed of crowded joints ; the third is longer than the se- 

 cond. The maxillae terminate in a projecting and fringed lobe. The 

 thorax is depressed anteriorly. 



These Insects are found on floAvers ; their larvae devour those of 

 certain Bees. 



Their stomach is widest anteriorly, and without plicae ; their in- 

 testine is short, with two enlargements behind. According to M. 

 Dufour, their crop is so short that it is almost entirely concealed in 

 the head %• 



C. apiarius ; Attelabus apiarius, L.; Trichodes apiarius. Fab. ; 

 Oliv., Col. IV, 76, 1,4. Blue; elytra red, traversed by three 

 bands of deep blue, the last of which occupies the extremity. 

 The larva devours that of our domestic Bee, and does much 

 injury to hives, 



C. alvearius ; Trichodes alvearius. Fab, ; Oliv., lb., I,5,a,b; 

 Reaum., Insect., VI, viii, 8 — 10. Almost like the preceding, 

 but with a bluish-black spot on the scutel. It inhabits the nests 

 of the Mason Bees — Osmia — of Reaumur, and feeds on their 

 larvse. 



Necrobia, Lat. — Coryxetes, Fab. 

 The four palpi terminated by an elongated, compressed, triangu- 



* Attelabus for micarius, L. ; Clerus formicurius, Oliv., Col. IV, 76, 1, 13; — 

 Clerus mutillarius, Fab. ; Oliv., lb., I, 12. 



t Attelabus mollis, L. ; Clerus mollis, Oliv., lb., I. 10. 



X The genital organ of the male is much more complicated than that of the Mely- 

 rides, Lampyridcs, and other Malacodermi. The last abdominal annulus is widely 

 emarginated. They and the Peltes of Fabricius are the only Coleoptera -which hftve 

 six biliary vessels — they are inserted into the c?ecum. 



