184 Rey. G. A. Crawshay on the 
together with other slightly different characters, he decided 
to make the Leighton Buzzard insect distinct. 
Two years prior to this Mr. F. Bouskell had discovered 
a red-legged Tetropiwm in some numbers near Leicester, 
June 15, 1903 (Ent. Record, 1903, p. 288). 
These specimens were erroneously reported to be taken 
from Spruce Fir (Picea excelsa), I had taken crawshayt 
exclusively from Zaria ewropwa which is deciduous and 
bears a very different bark. 
Reasonable doubt existing as to whether these two 
British forms were one and the same species, I made it 
my object to clear up this point by a series of breeding 
experiments. 
In Nov. 1905 I reared my first few specimens of the 
red-legged form from a log of Larix ewropea which con- 
tained also the form with black femora (crawshayt). 
This afforded a probability that they were one species, 
though as yet there was no proof that two different species 
had oviposited on this log. 
By August 1906 I had succeeded in rearing the form with 
black femora (crawshayi) from two red-legged parents. All 
intergradations of colour in the femora from ferruginous 
to black occurred in this series. 
Accordingly I was able to pronounce these two, in their 
extreme forms, different-looking insects to be one species. 
Would this prove to be 7. gabrieli ? 
To clear up this point I forwarded Herr Weise a long 
series of 7. crawshayi, asking him for his opinion on the 
subject. JI have at length heard from him to the effect 
that he considers 7. crawshayi a form of gabricli and has 
kindly communicated his single example of gabriela for my 
inspection. 
I concur with Herr Weise in this opinion. 
T. crawshayi then becomes a synonym for 7’. gabrielt and 
may be allowed to stand for that form which so largely 
predominates in this country, viz. with black elytra and 
black femora. 
This I propose to name 7’. gabrieli, var. b. 
I append a description in English of the type form and 
vars. :— 
Type form. Elongate, rather depressed, black ; legs and antennze 
ferruginous, tawny, pitchy-red ; palpi tawny to pitchy-red ; apex 
of abdomen tawny, pitchy-red, black ; frons conyex, not canaliculate ; 
