EXTERNAL ANATOMY OF INSECTS. 521 
In some male bees these papillee are inclosed in hexa- 
gonal spaces into which the antenne are marked out *. 
It is to be observed, that in many antenne the joints of 
the clavolet have one or two bristles or more at their apex, 
one above perhaps, and one below; the lower angle in 
those of the serrated antennz of Elater is usually so 
furnished, and sometimes the upper. In many Capri- 
corn beetles and various insects the antenne are clothed, 
instead of down, with stiffish hairs or short bristles. 
Other insects have these organs, at least the clavolet, be- 
set with longer hairs standing out from them on all sides: 
of this kind are those of a singular beetle (Sarrotrium 
muticum) sometimes found in this country’. Again, 
there are some that have only their underside bearded 
with longer hairs; as Lamia curculionoides, Acanthocinus 
speculifer®, and other Capricorns‘. In another of this 
tribe, Saperda hirsuticornis, the three intermediate joints 
are ornamented with branches of long black hairs, which 
give them an elegant and feathery appearance*®. In 
Callichroma alpina the apex of the slate-coloured joints 
of its antenne is bearded with black hairs. In Lamia 
reticulator, and Saperda fasciculata and plumigera, all 
also Capricorns, a single bunch of hairs, resembling 
the brush of-a bottle-cleaner, signalizes the middle of the 
antennze ‘: in Saperda scopulicornis this is star-shaped &. 
Sometimes the scape is externally bearded, as in Troz, a 
beetle found in horns and bones; and in many other 
Lamellicorns". In this last tribe the two exterior leaves 
of the knob of the antenne are often set with short 
* Kirby Mon. Ap. Angl. i. 184, t. x. **. d. 1. f. 8. 
b Plate XXV. Fic. 27. © Linn. Trans. xii. 439. 
4 Prater XIL. Fic. 26. SO ian oXON Ve LGae es 
§ Prare XII. Fic.-25. © PLATE: SX res LY, 
* Linn, Trans, xii, t. xxiii. fi 5. fe 
