April, '05] ENTOMOLOGICAL NEWS. Ill 



coxae; scutellnm oval, yellow except basally, and with an apical pair of 

 small bristles ; halteres yellow ; nietanotum deep shining black. Abdo- 

 men brownish yellow, blackish basally. Legs yellow. Wings hyaline, 

 second and third sections of costa of nearly equal length ; third and 

 fourth veins nearly parallel. Length 1.7 mm. 



One specimen. Tipton, Ga. June. Close to O. triangularis 

 Will., but is smaller, and the scutellum of entirely different 

 shape. 



Oscinis trisnlcata n. sp. 



Head yellow ; occiput, upper part of vertical triangle, upper margin 

 of third antennal joint, arista, and clypeus on each side, black. Mesono- 

 tum black, sides and humeri yellowish, with three longitudinal sulci ; 

 lateral bristles black ; pleura obscure brownish black ; Jscutellum con- 

 colorous, flat above, and with an apical pair of small bristles ; halteres 

 yellow. Abdomen brownish above, yellow beneath. Legs yellow ; 

 posterior femora with a blackish ring centrally. Wings hyaline ; third 

 section of costa about half as long as the second ; third and fourth veins 

 nearly parallel. Length 1.5 mm. 



One specimen. Opelousas, La. March. 



Observations on Papilio turnus var, glaucus. 



By Ernst Jeheber, Lancaster, Penna. 

 How fascinating is the first glance at a Papilio glauais flying 

 in nature, and it has often occurred to me that many collectors 

 must have wondered what the cause may be for its dimorphism. 

 Such has been m}^ case, and I concluded to rear this .species in 

 the hope of being able to a degree to solve this problem. My 

 first step was to carefully go over all the literature at my com- 

 mand which treated upon this subject, and from it I could only 

 learn that yellow females sometimes produced black females, 

 or that black females often produced yellow females : that the 

 larvae are either green, light to dark brown and blue-black. I 

 now procured a number of eggs and larvae of turnus and reared 

 them on their favorite food plants — namely, wild cherry, tulip 

 poplar and ash. The larvae all progressed nicely until after 

 the last moult, when I observed that a number of the larvae 

 after one or two days feeding showed signs of disease, in as 

 much as they stopped feeding and I could plainly see that through 

 their entire body they had a spasmodic jerking, which started 

 at the head and went in a wavelike manner until it reached 



