600 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
is a unique case, for no other Lepidopterous larva except the allied 
Chrysopyga is known to possess more than five pairs of abdominal legs. 
Lagoa appears to be the survivor of an ancient and very generalized 
type, and represents the polypodous ancestor of all Lepidoptera. 
Another archaic feature in this Insect is the presence of seven pairs 
of permanently everted finger-shaped processes on the first seven 
abdominal segments ; they occupy exactly the same position as the 
evaginable lateral glands of various Hemileucid®. In a longitudinal 
section indications are seen of a deep narrow cavity ; the glandular cells 
are modifications of the cells of the hypodermis. The author is in- 
clined to regard these organs as the homologues of the prothoracic 
osmateria of the larvEe of Papilionidae. 
The Aphides of Coniferee.* — Herr N. Cholodkovsky has made a 
special study of the genus Lachnus , whose species infest Conifers. He 
describes three species, L. pini L. on Pinus silvestris, L. pineti FI. on 
Pinus silvestris , and a new form L. farinosus on Picea excelsa. In all 
these the males were winged, and distinguishable from the winged and 
unwinged females by the greater length of their antennae (richly pro- 
vided with olfactory grooves), by the strong development of the thorax, 
by the small and weakly developed abdomen, and by the shorter body. 
There seems to be no migration from the pines to other plants. A 
peculiar form which occurred on Pinus cembra , Cholodkovsky distin- 
guishes as a variety of L. pini. From his researches it seems likely 
that some generations of a Myzus species, probably M. oxyacanthse Koch, 
also occur on pines. Peculiar structures in the fatty body of the males 
of Lachnus seemed to the author at first to be bacteria, but were after- 
wards recognized as pigment-bodies. 
African (Estridse.t — Prof. F. Brauer gives a list of twenty- five 
species of Gastricolae, Cuticolse, and Cavicolae known to be parasites of 
African Ungulates, and describes two new larval forms found by 
Dr, Holub. One of these — Strobiloestrus antilopinus g. et sp. n. — 
occurred in the skin of Oreotragus saltatrix and Pediotragus campestris ; 
the other — Dermatoestrus strepsicerontis g. et sp. n. — in the skin of 
Strepsiceros capensis. The author appeals to travellers and others not 
merely to observe larval CEstridae but to keep them and allow them to 
pupate so that the adult insects may be identified. 
y. FrototracReata. 
Oviparity of Peripatus Leuckarti.J — Dr. A. Demly brings forward 
fresh evidence in support of his statement that the larger species of 
Peripatus in Victoria sometimes, at any rate, lays eggs, and that these 
eggs are capable of undergoing development outside the body till perfect 
young are produced. It is true that a long time is required for the 
development of the eggs, but this is only to be expected when we consider 
the unusual length of time required for intra-uterine development in 
* Zool. Anzeig., xv. (1892) pp. 66-70, 73-78 (1 fig.). 
f SB. K. Bayer. Akad. Wiss, ci. (1892) pp. 4-16 (1 pi.). 
X Ann. and Mag. Nat. Hist., x. (1892) pp. 136-43. 
