1915.| F.H.GRaveLy: Indian Insects, Myriapods, etc. 487 
miliaris (Linn.) as an instance of the natural repellent effect of 
‘‘warning colours.” This species when irritated, besides exuding 
a pungent-smelling frothy fluid, makes a curious hissing sound. 
Precisely how it does soI have been unable to determine. Legs 
and wings commonly vibrate synchronously with the production 
of this sound when the insect is held by the body; but when 
any or all of these appendages are prevented from moving the 
sound may still be produced, though the insect is usually less 
readily disposed to produce it under these conditions. There is 
no perceptible vibration of the body wall such as occurs when 
a fly or wasp buzzes. The breeding and other habits of this 
locust are described by Green (Cir. R. Bot. Gardens, Ceylon, III, 
Pp. 227-235). 
The ‘‘terrifying attitude’’ assumed by a grasshopper (Acri- 
dium violascens) when attacked by a myna (Acridotheres tristis) is 
described by Manders (Spolia Zeylanica, VII, pp. 204-5). 
Kershaw gives a note on the habits and development of a 
Chinese ‘‘ Mastax or Eumastax’’ (J.B.N.H.S., XXII, pp. 416-7, 
pi B. part): 
Mr. Fletcher informs me that when he was in Coorg last year 
he found an Acridiid eating a large spider, a curious reversal of 
the normal course of events. 
Cotes and others between 18go0 and 1907 contributed a series 
of notes to the Journal of the Bombay Natural History Society, 
many of them of considerable length, on the habits, and especially 
on the migrations, of Indian locusts. 
>”) 
Locustidae. 
Green has described the stridulation of the common green 
locustid of Peradeniya (Spfolia Zeylanica, VII, p. 56). A very 
similar but slightly stouter insect occurs in Calcutta. It has a 
different note, which has been described by Cunningham (‘‘ Plagues 
and Pleasures’’, p. 171). This note is, however, not unlike the 
last syllable of the Peradeniya insect, though somewhat harsher 
and less prolonged. When the insect is in full song in the open a 
distinct click is audible alternating with the somewhat rapid 
succession of these notes. Mecopoda elongata has a somewhat 
similar note which it repeats indefinitely in a similar manner, but 
this note is louder and still more raucous. All three of these 
insects are nocturnal. 
Concerning the habitual attitude assumed by Sathrophyllia 
rugosa (‘‘ Acanthodis ululina”’) see Willey (Spolia Zeylanica, II, 
p. 199, I fig.) and Annandale (Mem. A.S.B., I, p. 209). 
Green (Spolia Zeylanica, V1, pp. 134-5) has described the habits 
of a leaf-rolling species of Grvilacris, presumably a close ally of, if 
not identical with, a species—Gryllacris aequalis—found in the 
Calcutta Botanical Gardens by Wood-Mason (see Griffini, Aééz. 
Soc. Ital. Sci. Nat. LI1 pp. 237-239, where references to other nest- 
