larvee of Diplosis tritici. The original describer was in doubt as to whether 

 this was really a parasite of this species, the wheat midge, or not. Re- 

 described by Mr. Ashmead from specimens reared by myself as above. 

 (Bull. IT. S. Nat. Mus., No. 45, p. 291, 1893.) 



A MITE, PROBABLY HYPODERAS COI.l'MH.K, PARASITIC IX THE PIGEON. By W 

 W. NORMAX. 



The LorusTiD.K of Indiana. By W. S. Blatchxey, Terre Haute, Indiana. 



The order of insects known as the Orthoptera comprises seven families, 

 three of which are alike in having the posterior femora more or less en 

 larged for leaping ; the three being therefore classed together in a sub- 

 order called the Saltatoria, or jumpers. 



In the present paper we have to deal with that family of this suborder 

 known as the Locustichr, which comprises those insects commonly called 

 katydids, green grasshoppers, and stone or camel crickets. 



The distinguishing characters of the members of the family Locustidiv 

 are the long, slender, tapering, many-jointed antenna 1 ; the almost uni- 

 versal absence of ocelli or simple eyes; the four jointed i: tarsi or feet; 

 and the ensiform or falcate ovipositor of the females which is made of four 

 Flattened plates; the males having, in many instances, abdominal ap- 

 pendages corresponding to the parts of the ovipositor, which are used as 

 clasping organs. The tegmina or wing covers, when present, slope obliquely 

 downwards, instead of being bent abruptly, as in the GryUidn- ; and in 

 most cases the wings are longer than the tegmina. 



The stridulating or musical organ of the males is quite similar in struc- 

 ture to that of the male cricket, being found at the base of the overlap- 

 ping dorsal surface of the tegmina and usually consisting of a transparent 

 membrane, of a more or less ruunded form, which is crossed by a promi- 

 nent curved vein, which on the under side bears a single row of minute 

 file like teeth. In stridulating the wing covers are moved apart and then 

 shuffled together again when these teeth are rubbed over a vein on the 



* The members of the genus Daihinia, no one of which occurs in Indiana, nave the 

 fore and hind tarsi three-jointed. 



