1 88 2.] Entomology. 599 



That there exists a relation between sun-spot periods and me- 

 teorological phenomena, and as a consequence between such in- 

 sect phenomena as depend on meteorological conditions, will 

 scarcely be doubted ; but we do not believe that any such con- 

 nection can be proved from the recorded capture of certain 

 species even in a country like England, which, entomologically, 

 is so thoroughly explored. However that may be, his table 

 shows that the maximum appearance of the species enumerated 

 follows the years of the minimum of sun-spots, and vice versa. 



A Mite Infesting a Pork-Packing House.— I send you by 

 this mail a few specimens of a mite which I do not identify by 

 means of the literature in my reach. It is found in a pork-pack- 

 ing house here and seems to develop from the livers, lungs, and 

 kidneys after they have been cooked and dried by steam. They 

 are treated in this way to reduce to a fertilizer. Where this ma- 

 terial lies in sacks on the floor the mite is found forming a layer 

 half an inch thick in places. 



If you are familiar with it will you be kind enough to send me 

 its name on the enclosed card?—//: /:'. Wilson, Professor Natural 

 Sen net in Coc College. 



This mite proves to be Tyroglv pints longior Gervais, and this is 

 the first occurrence of this species in the United States so far as 



Larv.f. of a Fly in a Hot Spring in Colorado— I send you 

 a bottle containing four specimens of animal life new to me, and 

 those to whom I have shown them. Having no works of refer- 

 ence I would respectfully ask you to describe them for me. They 

 were found in Gunnison Co., Col., in a hot spring, temperature 

 I 57° F., attached to the rock by the long end at about an angle 

 °f 45° and continually moving. Having no alcohol they were 

 put into strong alum water. The color has not materially 

 changed. The rocks were covered with them, as well as in other 

 springs which were examined. Any information regarding them 

 Br* thankfull y appreciated.—//. G. Griffith, j 17 X. 41I1 street, 



The larv'ae are of those of a species of Stratiomys, and are like 

 those from Borax lake. California, described and figured by us 

 m the American Journal of Science. February, 1871. p. 102. The 

 specimens received from Mr. Griffith are much larger than those 

 from Borax lake, and differ decidedly in the much longer and 



!al ^ species is half as 'wide as long, with a radiating tuft of res- 

 piratory filaments; in the present species it is nearly four times 

 as long as wide, and tapers to an obtuse point, with a transvene 

 °Pcning, and it is provided with minute short respiratory fila- 

 ments. The head is as in the Borax lake specimens, but the 

 Dod y is a little more flat, and spindle-shaped, being broader in 



