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 crcnulata group 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, navipcnnis 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 lingual pectination, and there remains no 

 single constant character for the separation of the two gen- 

 era. 



Notes on Sesiidae. 

 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. 



