SCOLOPENDRA. 13 
necessary. Specimens that I have seen vary in size from 106 to 150 millim. The 
colour is very variable, shading from olive-brown to deep green, the head being 
sometimes greener, sometimes redder than the body. Those with the head and first 
segment red and the trunk green have been named S. castaneiceps by Wood. I 
have seen one of these specimens from San Diego, Texas, measuring 106 millim., 
captured by Mr. William Taylor; but in structural features it does not differ from 
another example from the same locality, which is olive-brown in colour and measures 
140 millim. 
A young specimen of the S. castaneiceps-type, from this same locality, measuring 
36 millim. in length, has the anal legs exceedingly long and slender, their length 
equalling one-third of the length of the body and head. 
From Mexico I have seen five specimens: two, without special locality (Eisen coll.), 
135-150 millim., pale coloured; one from San Miguel (Hisen coll.), 145 millim., with 
greenish head and chestnut body; and two from Presidio (Forrer), 114-133 millim., 
with the hinder border of the terga green, the head greenish, the rest castaneous. 
9. Scolopendra copeana. (Tab. II. figg. 1, 1 a-d.) 
Scolopendra copeana, Wood, Journ. Ac. Nat. Sci. Phil. (2) v. p. 27 (1868) *; Trans. Am. Phil. Soc. 
xiii. p. 165 (1865) °. 
? Scolopendra pachypus, Kohlr. Arch. f. Naturg. 188], 1, p. 112°. 
Hab. Norta America, California! ?, Texas.—Mexico, Chihuahua (Montagu-Kerr), 
Tres Marias Is., Ventanas in Durango (forrer), Amula in Guerrero 6000 feet (4. H. 
Smith). 
This species, described by Wood from California, has been set down by both 
Meinert (Proc. Am. Phil. Soc. xxiii. p. 195) and Bollman (Bull. U.S. Nat. Mus. 1893, 
p. 175) as a synonym of S. heros. My opinion that the two should at all events be 
regarded provisionally as distinct is based upon the examination of a very large number 
of Californian specimens, submitted to me for identification by Dr. Gustav Kisen, all of 
which differ from the Texan specimens that I refer to S. heros in certain apparently 
constant characters. ‘These characters are: (1) the absence of an angular tooth on the 
inferior edge of the last and penultimate segments of the palpi; (2) the absence of 
sulci on the head-plate; (3) the presence of a median stria on the anal tergite; (4) the 
shorter anal pleurz, the posterior border being more nearly vertical and the process 
more slender and cylindrical. It may be added, moreover, that S. copeana seems seldom 
to attain the size characteristic of S. heros. I have, however, seen Californian speci- 
mens measuring 130 millim. in length (over 5 inches); but the average length is 
perhaps about 100 millim. The colour, too, as in S. heros, appears to be very variable, 
the trunk varying from olive-brown through various shades of green to chestnut, but 
the posterior portions of terga 2-20 are deeper green, which gives a characteristically 
D2 
