Vor. II, Pr. Il] HEBARD—DERMAPTERA AND ORTHOPTERA 323 
536, 122, 1 juv.; Gardner Island, June, 1906, 16, 22 ; and 
Hood Island, June, 1906, 152, 122. 
Locustin# (Acridiinz of authors) 
12. Schistocerca melanocera (Stal) 
(Plate 18, figures 1 to 5) 
1861. Acridium melanocerum Stal, Kongl. Svenska Freg. 
Eugenies Resa, II, Zool., I, Ins., p. 326. [ 2 ; [probably Charles 
Island], Galapagos Islands. ] 
We find the systematic treatment by Snodgrass® of this bril- 
liant and beautiful species to be nearly as bad as for Sphingono- 
tus fuscoirroratus (Stal). That author divided the species into 
five races, naming four as follows: m. minor, m. pallida, m. 
lineata and m. immaculata. These are based on features of size 
and color variation, wholly unworthy of nominal recognition 
and are here unreservedly assigned to synonymy. 
In size, material from certain islands shows a different aver- 
age from material from other islands. This is of interest in 
studying differences in environmental conditions and in study- 
ing the lines followed by the species in becoming distributed 
through the islands. It is of no specific or racial diagnostic 
value, as similar size variation is found in many other species 
of the genus, in none being worthy of nominal designation, « 
hence m. minor falls. Color recession explains and disposes, As 
the type named m. pallida. A distinct pale line bordering 4 
ing feature of color development, but of no taxonomic val 
was used as the main reason for proposing m. lineata. T 
series at hand shows this condition as follows: Tagus Cove, 
Albemarle Island 1¢; Villamil, Albemarle island, WO SUES 
solidly dark colored prozonal and metazonal portion of the 
pronotal lateral lobes was used as a basis for m. wmmaculata. 
This is a color-phase (see plate 18, figure 2), similarly of no 
taxonomic value and probably genetic in character. The normal 
condition, showing a spot in this area, is probably the primitive 
type. The solidly dark phase is represented by the following 
material; Villamil, Albemarle Island, 1? ; James Island, 2 ¢, 
5 Proc. Wash. Acad. Sci., IV, pp. 413 to 425, pl. XXVII, figs. 1, 5 and 6, (1902). 
A TpF 
ventral margins of the dorsal abdominal segments, an ag 
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