184 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
found a form whicli differs in some respects from Cli. viridis, for which 
he proposes the name of Ch. viridanus. Its interest lies in the fact that 
it is exclusively parthenogenetic and confined to the larch, while the 
other species migrate from larch to pine. Its discoverer considers it to 
be derived from the Ch. viridis, and suggests that it owes its origin to a 
prolonged sojourn of the ancestral form upon the larch, and therefore to 
the influence of changed diet. 
Larva of Sarcophaga aflinis in Man.* — Dr. G. Alessandrini de- 
scribes an extraordinary case of parasitism. A boy of thirteen, otherwise 
healthy, comjilained of pains on the top of his head. The source of 
these was found in several small tumours, out of which larvae emerged. 
One of these was hatched and identified as Sarcophaga a finis Meig., 
which is briefly described. A useful account and bibliography of 
similar cases is given, but for this species the occurrence in man seems 
unique. 
Proteid-digesting Saliva in Insect Larvae.f — Dr. Wilibald Nagel 
describes the method of feeding in larvae of Dytiscus. In these larvae 
the mouth is very much reduced in size, and the ingestion of food is 
performed by means of suction through the much modified mandibles, 
the process being facilitated by the powerful digestive action of the 
saliva. Under natural conditions the larvae eat only living animals, but 
in captivity they will also take pieces of meat. The saliva has a marked 
poisonous action, killing other insects, and even tadpoles of twice the 
size of the attacking larva, very rapidly. The larvae not only suck the 
blood of their victims, but absorb the proteid substances. Drops of 
salivary juice seem to paralyse the victim and to ferment the proteids. 
The secretion is neutral, the digestion tryptic. Similar extra-oral 
digestion seems to occur in larvae of ant-lions, &c., and spiders, and, 
according to Krause, in Cephalopods. 
Accessory Nucleus (Nebenkern) in Spermatogenesis.}: — Dr. B. von 
Elian ger points out that it is high time to put an end to the confusion 
which has arisen in regard to the use of the word Nebenkern. Biitschli 
applied it to the halved cell-bridge or spindle-residue in the spermatides 
of the cockroach, and this signification it should retain. But v. La 
Valette used the same term in reference to the granular envelope or 
hood around the nucleus of the spermatocytes of the first order, and 
Platner has applied the term to the centrosome and the dark granules 
around it. 
Wound-Healing in Carabus.§ — Dr. C. Verhoeff* finds that a wound 
on a full-grown Carabus, and presumably on other insects, is speedily 
closed, not merely by a clot of blood, but by a new growth of chitin. 
B. Myriopoda.’ 
Lymphatic Glands of Myriopods.|) — Prof. A. Kowalevsky finds that 
when a centipede ( Scolopendra cingulata ) is injected with carminate of 
ammonia mixed with indigo-carmine and Chinese black, the carmine 
* Boll. Soc. Bom. Stud. Zool., iv. (1895) pp. 278-89 (1 pi.). 
f Biol. Centralbl., xvi. (1896) pp. 51-7 (1 fig.), 103-12. 
X Zool. Anzeig., xix. (1896) pp. 65-9. § Tom. cit., pp. 72-4. 
|| Arcli. Zool. Exper., iii. (1895) pp. 591-616 (6 pis.). 
