164 ENTOMOLOGICAL NEWS. {April, ’o8 
all closely any previously described species of Lachnosterna 
with which I am acquainted. It possesses the characters which 
in Horn’s synopsis define the crenulata groupt and may be 
placed at the end of that series, differing from all of them, 
and indeed from all known species of the genus in its prom- 
inent front thoracic angles, and in the form of the hind coxal 
plates. The terminal joint of the maxillary palpi may be best 
described as cylindro-ovate, differing more or less from all 
other species of the group, though nearest aemula; it is feebly 
impressed in the male, scarcely at all so in the female. 
In the paper on Listrochelus by Dr. Horn,* the prolonged 
and acute free angle of the hind coxal plate is said to be a 
constant character in this genus, while in Lachnosterna, the 
angle is sometimes right, but never acute or prolonged. This 
is a mistake. Compare for instance antennata, nitidula and 
tristis of Lachnosterna with disparilis, favipennis and carmin- 
ator of Listrochelus, and the coxal angle will be found to be 
quite as prominent or even more so in the Lachnosternas. 
This structure then is no more distinctive than is the verti- 
cal carina or the ungual pectination, and there remains no 
single constant character for the separation of the two gen- 
era. 
<< 
— 
Notes on Sesiidae. 
4 By Henry ENGEL. 
Sesia bassiformis Walker. 
During the summer of 1905, the Messrs. Kahl and Klages 
collected a number of specimens of this species at Ohio Pyle, 
Pa. Previous to these captures my only record of bassiformis 
from this section was a specimen given me by Mr. Knechtel. 
The Ohio Pyle specimens were taken in a field where Iron 
Weed grew in abundance, either resting on the leaves of these 
plants or flying about in the field. This note furnished a clue 
to locate this species in my collecting grounds about Pitts- 
*Trans. Am. Ent. Soc. VII, 1878, p. 138. 
