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clawe. r am glad the specimens arrived in as good order as they did. I wonld like 

 to know if they are really poisonous or hurtful. If you should wish any more I can 

 furnish them to you. We have plenty of the common Scorpions — stinging kind. I 

 saw an old one with six or eight young ones on her back, riding them around. My 

 wife was stung several times with these. It is like a wasp sting only. — [Dr. L. B. 

 Rowland, Silver Springs Park, Marion County, Fla., October, 1890. 



Horse flies in Texas. 



I have specimens of the insects mentioned in my last letter. The little fly that 

 bites the horses' ears you will find in the cap box ; I captured two of them. They were 

 so gorged with blood that they rotted in two days, but perhaps you will recognize 

 them. In thu same box you will find flies that bite the horses' legs and belly ; 

 you will perhaps notice two different kinds of these small flies; the one with the 

 green eyes bite the belly and the gray-eyed ones the legs ; you will also find another 

 big black fly which looks different from the one I sent you before. In that bottle 

 you will find the gray Tabauus and the green-eyed one, also some Hymenoptera. In 

 the square bottle your will find some beetles. The beetles come in at the window at 

 night, but the flies I captured on the horses. [F. W. Thurow, Hockley, Harris County, 

 Tex., June 20, 1890. 



Eeply. — The specimens have been determined as follows: 



Chrysops vittatus Wied. is the species mentioned in your former letter and also 

 inclosed in your last letter. 



Chrysops sp. is the little fly which bites the ears of horses. It is too badly damaged 

 to determine specifically. 



Tabanus lineola and T. costalisf are the gray-eyed flies which infest the legs of the 

 horses. 



Tahanus sp. is the green-eyed fly mentioned. It is too badly injured to be deter- 

 mined. 



Tabanus americanus is the large black fly. 



Tabanus molestus? is the gray fly. 



Chrysis sp. is the Hymenopteron, also too much injured to be further determined. — 

 [June 26, 1890.] 



A Borer in a Tree Fungus. 



I send you by mail to-day what may be a peculiar study of insect life, a piece of 

 fungus growth which I secured for the purpose of painting] thereon a landscape. 

 While standing on a mantel awaiting the convenience of the artist, the holes you 

 will find in it appeared, evidently spoiling it for artistic effect. I noticed about them 

 a number of minute flies but no larva, but a few days ago I detected the operation 

 of some individual inside. I have closed up the holes and send it to some one better 

 able to investigate than self. I don't know that it will be new or interesting but 

 concluded no serious harm would be done by forwarding it to you. — [T. P. Hen- 

 derson, Hulton, Pa., September 3, 1890. 



Reply. — * * * This fungus of the genus Polyporus has been bored by one of 

 the common fungus beetles known as Boletotherus bifurcm. It is a common insect, 

 but is seldom noticed except by those who are searching for it. Careful examination 

 of the fungus sent shows three living beetles, but no larv* or pupse. — [September 4, 

 1890.] 



Migration of Callidryas eubule. 



I send you inclosed a butterfly that has been attracting a great deal of attention 

 in this part of Alabama. 



They are flying over our country by millions, from a northwesterly direction in a 

 southeasterly course. When they come to trees or houses they rise gradually and fly 

 over them. They light but for a short time on leaves and flowers and then hasten 

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