528 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1914. 
The cases of tarsus-bearing antenne in Cimbex axillaris and Bom- 
bus variabilis, Schmkn., recorded, by Kraatz(2) and Kriechbaumer(3) , 
have already been referred to at length in the foregoing. 
Klemensiewicz(14) briefly mentions a male specimen of a Zygena 
species, which had tarsal claws on the tip of both antennz; on the right 
antenna were found two claws, on the left only one was apparent. 
Doumerec(15) has described an abnormal antenna in a specimen 
of Bombus agrorum Latreille. As this may be a case of a slightly 
developed tarsal joint on the antenna, it has been included in Przi- 
bram’s tabulations, but with a question mark. 
The above-mentioned cases of homeeosis, which are all classed by 
Przibram as substitutional, agree in having the tarsal formation 
occur on a stalk of antennal joints. In this they agree also with the 
spontaneous case in Carausius, which is described below. 
In this connection must also be mentioned a male Tenthredopsis 
nassata, var., described and figured by Jacobs(16) which, besides the 
normal antenna on the right side of the head, carried a peculiar 
joined appendage which is inserted beside the second antennal joint 
on the basal antennal joint. Jacobs does not express any opinion on 
the nature of this appendage. Przibram places the case in his tabu- 
lations in the following noncommittal manner: Under the headings 
‘‘Morphologischer Wert des abnormen Gebildes”’ and ‘‘Ersatz-, 
Zusatz-, oder Versatz-Homeeosis,”’ this case is placed relatively as 
‘Fuss ?”’ and ‘‘Zusatz?”’ 
Reference must finally be made to the Tenebrio recorded by Tornier 
and mentioned in the foregoing. 
ORIGINAL OBSERVATIONS. 
After this review of the literature on homeosis in insects, I shall 
now discuss my own observations on the homeotic regeneration of the 
antenne in a Phasmid, Carausius (Dixippus) morosus. These 
observations may be of some interest because, so far as I know, it is 
the first time that the development of a typical homeeosis in insects 
has been referable to regeneration. 
The first cause of my studies was a spontaneous case of substitu- 
tional homceosis, found in a reared lot of this Phasmid, which is 
commonly utilized by students of insect biology. This interesting 
species, whose home is India, propagates itself almost entirely par- 
thenogenetically, at least in captivity. 
On this spontaneous case of homeeosis I shall record the following 
notes: 
October 16, 1911, a number of half-grown larvee of Carausius were 
selected for some regeneration experiments. The lot, which con- 
sisted of about 50 female larve, had been somewhat neglected with 
regard to fresh food (rose leaves) and was therefore badly injured 
through cannibalism. This always occurs when a large number of 
