THE PIGEOX TEEMEX. 
537 
with a seal, are ochre-yellow. The antennae are rather 
short and blunt, rust-colored, with a broad black ring in 
the middle. The wings expand two inches and a quarter, 
or more; they are smoky brown and semitransparent. The 
less are ochre-vellow, with blackish thio-hs. The borer, awd, 
or needle is as thick as a bristle, spear-pointed at the end, 
and of a black color; it is concealed, when not in use, 
between two narrow rust-colored side-pieces, forming a kuid 
of scabbard to it. 
This insect is fio-ured and described in the second volume 
O 
of the late Mr. Sav’s “ American Entomology.” The male 
does not appear to have been described by any author; 
and, although agreeing, in some respects, with the two 
other species represented by Mr. Say, is’ evidently distinct 
from both of them. He is extremelv unlike the female 
V 
in color, form, and size, and is not furnished wdth the re¬ 
markable borer of the other sex. He is rust-colored, varie¬ 
gated with black. His antennae are rust-yellow or blackish. 
His wiiiHS are smokv, but clearer than those of the female. 
His hind bodv is somew^hat flattened, rather widest behind, 
and ends with a conical horn. His hind leo-s are flattened, 
much wider than those of the female, and of a blackish 
color; the other legs are rust-colored, and more or less 
shaded with black. The leno;th of his bodv varies from 
three quarters of an inch to one inch and a quarter; and 
his wings expand from one inch and a quarter to two inches 
or more. 
An old elm-tree in this vicinity used to be a favorite 
place of resort for the Tremex Columba^ or pigeon Tremex; 
and around it great numbers of the insects were often col¬ 
lected, durino; the months of Julv and Auo;ust, and the 
early part of September. Six or more females might fre¬ 
quently be seen at once upon it, employed in boring into 
the trunk and lavino; their eo;£CS, while swarms of the males 
hovered around them. For fifteen years or more, some 
large buttonwood-trees in Cambridge have been visited by 
68 
