102 ENTOMOLOGICAL NEWS. [April, 



Mr. Herman Hornig, stating that the caterpillars of the larger 

 Bombycidse store up food for use in the chrysalis state, which 

 they gradually use up as they near the imago or perfect condi- 

 tion. Dr. Calvert killed some chrysalids in hot alcohol and split 

 them into halves — these showed the black substance to which 

 Mr. Hornig alluded. It lies in the middle portion of the alimen- 

 tary canal and is dark green, almost black and very hard. It 

 consists of food in conjunction with some excretory substances, 

 and is covered by a membrane, probably the remains of the lar- 

 val alimentary canal. The speaker is studying the subject still 

 further. Mr. Hornig said the substance was much less in bulk 

 in the advanced stage of the chrysalis, which led him to think 

 that the chrysalis actually lived on the substance. Dr. Calvert 

 said that Lownes refers to a similar substance in the pupa of the 

 blow-fly, as the yellow body. Dr. McCook mentioned that in 

 the cocoon-spinning Formicidae there is found an excretory sub- 

 stance in the anal end of the cocoon. The same thing occurs in 

 other Hymenoptera, such as bees and wasps. Mr. Fox exhibited 

 three sheets of a work from the library of Dr. Horn, entitled 

 Monographia Amaroideum by Zimmerman, which was probably 

 the second copy known. Dr. D. M. Castle was elected a member 

 of the Society. Henry Skinner, M.D., Rec. Secretary. 



At the meeting of the Feldman Collecting Social held on 

 March 8, 1898, at the residence of Mr. H. W. Wenzel, No. 1523 

 S. 13th Street, Philadelphia, Mr. Seiss reported the presentation 

 of 108 specimens of local Orthoptera to the Academy of Natural 

 Sciences of Philadelphia in the name of the Social. 



Prof. Smith read aipaper on "Quarantine against Injurious 

 Insects." The same speaker also read a note on the San Jose 

 scale by T. D. A. Cockerell. (Both articles are in this nuriiber 

 under Economic Entomology.) 



Dr. Skinner admitted the force of Prof. Smith's argument, but 

 believed that inspection would exclude many injurious insects 

 if not all. It is not certain that pests brought from abroad will 

 not become acclimated. 



Prof. Smith stated that among all the imported insects which 

 have become pests in this country there is not one which could 

 have been excluded by inspection. The history of the bill now 

 before Congress was given by the same speaker. 



