JOURNAL OF ENTOMOLOGY AND ZOOLOGY 115 
THE SOMBRE TWIG-PRUNER, THERCLADODES 
KRAUSSI, WHITE 
CLAUDE FULLER 
The Agricultural Journal of the Union of South Africa, 
Feb., 1913. 
This beetle attacks privet, jassamine, and olives, but has not 
become much of a pest, as it can be rather easily controlled by 
pruning. If olive growing were extensive, however, it would 
probably cause trouble. 
The life of the larva is interesting. The egg is laid in a 
little cavity excavated about six inches from the end of the 
stem. As soon as the larva hatches, it bores up about one 
inch, then enlarges the cavity, turns around, and works down 
to between one and two inches below the site of the egg. It 
then backs up to the enlargement, turns around, and backs 
down to the bottom, where it remains for some days, then 
ascends for a little distance and girdles the twig, which breaks 
off. It then plugs up the hole and descends to the bottom of 
the burrow to moult. After moulting, the whole process is 
repeated, and it is repeated with each moult until the larva 
pupates. 
Mabel Guernsey. 
ABSORPTION UND SECRETION IM DARM VON 
INSECTEN 
ALBRECHT STEUDEL 
Zool. Jhrb. Bd. XX XIII, Heft 2, 1913 
The most important conclusion is that there is a double 
function for the intestinal epithelial cells which are active, the 
function of absorption and secretion. Many authors describe a 
rest and a secretion stage. In Periplaneta and other insects 
absorption takes place during the rest stage. In many if not 
all insects the intestinal epithelium has this double function. 
