E. 
} 
F 
i 
i 
3 
l 
1894,] Entomoiogy. 281 
ted in the upper figure of the accompanying plate. After much 
experimenting, Mr. Slingerland finds that “there are three practi- 
cable methods by which this pest can be controlled: kerosene 
emulsion for the nymphs ; destruction of the eggs by pruning; and the 
capture of the nymphs and adults by jarring into receptacles where 
they are destroyed. Circumstances will largely determine which 
method will prove the most practicable in specific cases. 
The bulletin concludes with an extended bibliography and syno- 
nymy, and is represented by 13 figures, four of which are reproduced 
herewith. . 
Indiana Orthoptera.—Two important papers, by Mr. W. S. 
Blatchley of the Terre Haute High School, have recently appeared.’ 
The first is entitled the Locustide of Indiana, thirty-nine species being 
catalogued, while a list of twelve others that are likely to be found in 
the State is given. 
Concerning the musical powers and general habits of these katy- 
dids and their allies, Mr. Blatchley writes: “ The stridulating or mus- 
ical organ of the males is quite similar to that of the male cricket, 
being found at the base of the overlapping dorsal surface of the tegmina, 
and usually consisting of a transparent membrane of a more or less 
rounded form, which is crossed hy a prominent curved vein, which, on 
the under side, bears a single row of minute file-like teeth. In stridu- 
lating the wing covers are moved apart and then shuffled together 
again when these teeth are rubbed over a vein on the upper surface of 
the other wing cover, producing the familiar so-called * katydid °’ sound. 
Each of the different species makes a distinct call or note of its own, 
and many of them have two calls, one of which they use by night and 
the other by day. Anyone who will pay close attention to these differ- 
Fig. 3. A Locustid. [after Bruner]. 
ent calls, can soon learn to distinguish each species by its note as readily 
as the ornithologist can recognize different species of birds in the same 
* Proceedings Indiana Acad. Science, 1892, pp. 92-165. 
