17G V,U\\'. JACOBSON, PTILOCKRUS OC'HUACEÜ.S. 



cocoons; but other sheltered places serve the same purpose, 

 and many dwelling-houses are infested by them. On post and 

 beams countless numbers are busily moving along definite 

 paths. Their hunting grounds extend to the surrounding trees 

 and shrubs, where they keep large herds of Aphids, Coccids 

 and Membracidae for the sake of the sweet excretions these 

 insects and their larvae afford them. I often found with these 

 ants caterpillars of the Lycaenid butterfly Genjdus Boisduvali 

 Mre ^), which make themselves agreeable to the ants by yielding 

 a fluid of which the ants are fond, but in their turn they 

 feed on the scaleinsects kept by the ants. 



This all goes to show that Doliclioderus (ntuhermlatus is 

 particvilarly fond of the sweet excretions of different insects, 

 a taste which sometimes leads to its wholesale destruction, as 

 v^^e shall presently learn. 



Most of the anfs, which I found in the above named locality 

 near the bugs, appeared to be in a more or less paralysed 

 state and the ground beneath was in some places covered an 

 inch thick with dead ants. These corpses were continually 

 carried off by another kind of small red ant, but new victims, 

 dropped from the roof, incessantly replaced those that were 

 removed. As the spot where the bugs had settled down was 

 a very inconvenient one for closer inspection, I gathered a 

 large number of the insects, adults as well as nymphs, and 

 carried them home alive, together with a section of a bamboo 

 pole from the roof, which being split open revealed a large 

 number of bugs' eggs, fastened to the inner surface. 



Soon afterwards 1 left Wonosobo and returned to my dwel- 

 ling-place Samarang, where I had a better opportunity for 

 observino- the bugs at leisure. The ants I had found with 

 them at Wonosobo also abounded near my house; so I brought 

 a great number of these ants together with the bugs in a 



1) Prof. Courvoisier at Basle v.as so kind to y,ive me the name of tliis 

 biitteifly. 



