16 THE CANADIAN ENTOMOLOGIST 



thread; tul:ercle IVa on joint ten seems always absent in this 

 species, ten larval preparations at least have it unindicated; lengths, 

 2.5. 6.5. 11 mm.; May 25-June 18; Buffalo, \. V. (Iarv;c per H. 

 Baumann). 



Papaipema circumlucens Smith. 



When the late Dr. J. B. Smith advanced this specific name at 

 the "Revision of Hydroecia," 1899. Trans. Am. Ent. Soc. Vol. 

 XX\'I. the knowledge of larval stages was not of avail, and the 

 material for study scanty, and of inferior ciuality for the most 

 part. Though his efforts for fullness were well directed, and the 

 co-operation of museums and collectors very general, a miscon- 

 ception in regard to the indi\iduality of circumlucens has been 

 recognized for some time, in that more than one species was as- 

 sociated among his types. The writer had arrived at a conclusion 

 as to what form Dr. Smith intended his name should apply, but it 

 was not until 1914 that the larval history became positively known 

 in the particular instance it was necessar\- to cite. Of his "types" 

 and "co-types" we ha\e recently had the advantage of comparing 

 those in the U.S. National Museum, the Barnes and Rutgers 

 collection, while a female co-type was in the possession of the 

 writer. Three species are found to be involved — the Hop-stem 

 borer, one whose chief foodplant is Dogbane; the true circumlucens, 

 and ochropenta Dyar, a western species with the larva unknown. 

 The Hop-stem borer has already been differentiated as P. humiili 

 Bird, Can. Ent., Vol. XLVH, p. 113. We herewith restrict the 

 type of circumlucens Smith to the female type specimen of the United 

 States National Museum, which was without doubt a feeder in 

 Apocynum, Dogbane, in its larval state, and for the following 

 reasons. Of the six "types" or "co-types," this form predomin- 

 ates; in our own collection a perfect specimen of the Hop-stem 

 borer was labeled merely "circumlucens," while a much-worn Dog- 

 bane feeder was ticketed "circumlucens Sm. female co-type"; 

 ochropenta occurs in but one specimen. The other male "type" 

 Washington is humuli. 



It is needless to add that from the conventional pattern in the 

 group and the nearness of coloration of the forms involved, the 

 oversight at the time of commission is easily understood. 



