298 ENTOMOLOGICAL SOCIETY 



the green leaves. I took a large series of the pupae, which are 

 red-brown with obscure darker markings of umber-brown. The 

 larval skin is either entirely gone from the pupa above, or the 

 pupae are only covered with a few fragments of the larval skin, 

 and only the ventral parts of the skin remain as a flattened surface 

 upon which the pupa rests. 



Only a small number of imago beetles ( Thalassa montezumce) 

 could be found, many of them just matured but still within the 

 split skin of pupa. It is a large and powerful species, and I saw 

 several of them feeding ravenously upon the Coccids and eating 

 them bodily. As to the larvae, they appear rather sluggish, and I 

 could not detect them eating the mature Coccids. It may be that 

 they eat only the young or the excretion. 



However, I wonder if this Lady-bird would not prove an 

 effective enemy of the Black Scale (JLecanium olece) if introduced 

 into the olive orchards of California. I have mailed a large tin 

 box with a lot of pupae, most of which will have disclosed by the 

 time they get to Washington, if they are not crushed. 



Mr. Schwarz added that the Mexican Thalassa montezumcz 

 had never before been found within the United States, the locality 

 " New Orleans, La.," given by Mulsant, being evidently erro 

 neous More recently, Dr. Horn had recorded it from the Cape 

 region of Baja California. The species is apparently a hardy 

 one, and able to stand transportation to long distances, since all 

 larvae and pupae mailed by Mr. Hubbard reached Washington 

 safely. Among them a few specimens of another Coccinellid 

 larvae were found which proved to belong to one of the numerous 

 varieties of Hyperaspis undulata. 



Mr. Pratt exhibited the moth of Xylina ferrealis, taken 

 February 28th, this year. New York was the most southern 

 point previously recorded for it. 



Dr. Dyar showed living larvae of Calybia slossonive, from 

 Florida, feeding on mangrove leaves. 



Dr. Kenyon read two notes of recent discoveries : A bacillus 

 parasitic on Phylloxera, and the production of immunity against 

 the bite of the viper by injection of the poison of.Vespidae. 



Dr. Stiles discussed the former, saying that the use of Bacteria 

 in economic questions had been frequently productive of undesir 

 able results.' 



The first paper of the evening was by Dr. Kenyon, and was 

 entitled "A New Diplopocl from Mexico." 



