38 
SCIENCE. 
C. ADJUNCTS TO TAXIDERMY. 
Tools, eyes, materials, perches, leaves, rock-work, 
etc. 
Already a large number of important objects are 
entered for exhibition, consisting chiefly of artistic 
groups, both large and small, and it is certain that 
there will be a fine display in class B, or household or- 
naments and decorations, most of which will be en- 
tirely new and original in design. A silver medal will 
be awarded to the finest single exhibit, a ■ bronze 
medal to the best general exhibit, and a diploma of 
honor to the best exhibit in each of four natural 
classes, viz. : Mammals, birds, reptiles and fishes. A 
number of interesting papers and notes upon the va- 
rious methods of taxidermy will be read at the general 
meeting and afterwards published in a volume as the 
proceedings of the society. From now until Decem- 
ber each member will be busily engaged in putting 
forth all his skill and knowledge in the effort to win 
some of the honors offered for the highest excellence. 
It is to be earnestly hoped that their vigorous and 
already successful movement will meet the hearty ap- 
proval and co-operation of all American taxidermists, 
both amateur and professional, and that they will, by 
joining the society, and taking active part in the 
meetings and exhibitions, help to build up a powerful 
and influential organization, which is devoted to their 
best interests. The most unskillful amateurs are cor- 
dially welcomed as members, if they are but earnest 
in taking hold of the work in hand. It now remains 
to be seen how much liberality of mind, enthusiasm 
of purpose and ambitious enterprise will be awakened 
by this movement among American taxidermists. 
DESCRIPTION OF SOME MONSTROSITIES 
OBSERVED IN NORTH AMERICAN 
COLEOPTERA. 1 
BY HORACE F. JAYNE. 
The accumulation of material in some of the larger 
collections of Coleoptera of our fauna has suggested 
that a description of the more marked monstrosities 
might be interesting, and aid at some future time in 
throwing light on points of development not yet un- 
derstood. I have, therefore, in this paper, describ- 
ed and figured those monstrosities which M. Moc- 
querys of Rouen, in his excellent work on Abnor- 
mal Coleoptera, calls “ Monstrosities by Excess.” 
Deformities by deficiency or incomplete development 
have not been considered as they do not seem of 
sufficient importance, and point only to accidents 
happening to the insects while in the larvae or pupae 
stage. 
I desire to return my sincere thanks to Dr. Horn 
for the free use of his collection and library, for many 
suggestions and for kindly revising these pages ; also 
to Dr. LeConte for the loan of specimens from his 
cabinet, and to Dr. Hagen for the use of specimens 
belonging to the Museum of Comparative Zoology at 
Cambridge. 
CALOSOMA TRISTE, Lee. 
Fig. i represents a monstrosity on the right antenna 
of a specimen of Colosoma triste, Lee. It consists 
in the sixth joint bearing two branches of five joints. 
Fig. i a, shows the antenna greatly enlarged. The 
first three joints are normal ; the third a little dilated 
at apex. The fourth is normal in length but is one- 
half broader at apex. When viewed from above it is 
distinctly pyriform. The fifth joint is also of normal 
length but twice the width of that of ‘he left side and 
slightly broader at apex. The sixth joint is penta- 
gonal in form, in its widest place as wide as long. 
The apex is obliquely truncate on its inner and outer 
angles, presenting two unequal faces for the insertion 
of the two branches. The inner or posterior facet is 
much smaller and from it arises that branch with the 
joints exactly resembling the normal antenna. The 
anterior or outer facet is larger and gives insertion to 
an anterior or outer branch of five joints ; the first 
being short and thick the others similar to the corre- 
sponding normal joints but smaller. 
The specimen is in Dr. Horn’s Cabinet. Collected 
in California. 
CYCHRUS ANGUSTICOLLIS, Fisch. 
Fig. 2 represents the deformed left anterior leg of 
a specimen of Cyckrus angusticollis. The femur is 
greatly dilated a little beyond the middle and gives off 
from its superior border a tubercle moderately long 
and blunt at tip. This may possibly indicate an 
attempt at the development of a second leg. The 
femur is then narrowed and at apex is a little larger 
than the apex of the normal joint. The existence of 
a cotyloid cavity shows the former presence, and acci- 
dental loss of the tibia. 
In the Museum of Comparative Zoology at Cam- 
bridge. 
METRIUS CONTRACTUS, Esch. 
A monstrosity in the middle left leg of a specimen 
of Metrius contractus is shown in fig. 3. The femur 
bears two tibiae ; the inner one bearing two full sets of 
tarsal joints. The femur is normal. The outer tibia, 
which may be regarded as the normal one, arises from 
the extremity of the femur and is somewhat shorter, 
stouter, and more curved than the tibia of the middle 
right leg. The inner tibia arises from the posterior 
side of the femur a short distance within the tip and is 
articulated with it by a separate cotyloid cavity, the two 
cavities however are confluent as seen in fig. 3a. It 
is distinctly arcuate, dilated toward the apex which is 
obliquely truncate at each angle. From each facet 
thus formed arises a tarsal joint of normal length, al- 
most contiguous at their bases, and somewhat stouter 
than the succeeding joints which are normal in form 
but shorter than those of a normal tarsus. There are 
four terminal spurs to this tibia, two placed external 
to the outer tarsus, two within the inner. 
In Dr. Horn’s Collection. 
PASIMACHUS PUNCTULATUS, Hald. 
A specimen of Pasimachus punctulatus has seven 
legs ; the extra one arising from a trochanter placed 
between the normal trochanter and femur of the left 
A paper read before the Am. Ent. Soc., June, 1880. 
