140 
Psyche 
[June 
4. Non-carnivorous, non-gregarious, feeding on decaying 
damp wood. 
As pointed out previously the “trilobite-larvae” must belong 
to different genera. As normally developed females are known 
of all described Lycid genera and as it is utterly incredible that 
one and the same species should possess both winged and larvi- 
form females normally as Gravely suggests ( l . c. p. 362) I venture 
to prophesy that several new genera of “trilobite-larvae” will be 
described in the future. If these should possess more strange 
characters than does Duliticola, compared with normal Lycids 
(viz., Dihammatus) it would perhaps be justifiable to separate 
the group of “trilobite-larvae”, characterized by so many strange 
features and habits, as an offshot of primitive Lycoid beetles and 
give them the rank of a family or sub-family of their own (Duli- 
ticolidae of Duliticolinae) related to the other four groups of 
malacodermata and via Duliticola more so to the Lycids than to 
the Lampyrids and Drilids. 
But at the present moment our knowledge of these queer 
creatures is too scanty to justify such a step. 
Food And Habits Of The “Tribolite-Larv^.” 
The “trilobite-larvae” are chiefly found on or in the vicinity 
of big rotten logs, sometimes several near the same spot, but as 
a rule they do not show any tendency of being gregarious, odd 
larvae often being found crawling about anywhere in the jungle. 
They like rainy weather and are mostly found crawling around 
after heavy showers. 
The larvae feed on the juice of decaying wood, as clearly 
evidenced not only by the contents of the stomach but also by 
direct observations. But they seem to be very particular in 
getting the right kind of wood. When changing food every day 
I had many opportunities to study their behavior. Often they 
crawled over the new pieces of wood put in the cage until they 
came to the proper kind. There they used to accumulate and I 
could plainly see by aid of a powerful magnifying glass that they 
actually were sucking the juice from the wet pieces of wood. 
Larvae killed and examined some hours afterwards were found to 
