1895.] Entomology. 863 
desmidz and Lysiopetalidx,’ but if we acknowledge its distinctness a 
choice is still necessary between the names mentioned in the heading. 
The weight of more recent usage is clearly on the side of “ Chordeu- 
mide,” indeed this name seems to have been almost exclusively em- 
ployed since it was taken up by Latzel in his great work on the Aus- 
trian Myriapoda (1884), after having been entirely disregarded since 
its publication by C. L. Koch (1847). The alternative is thus between 
ten years of usage or five years of priority.’ For those of us who may 
have used “ Chordeumide” on the supposition that Latzel must have 
had some good reason for neglecting an earlier name, it may save the 
trouble of reference to a comparatively rare book to state that in Gray’s 
arrangement “Fam. 2 Craspedosomide” includes the four genera 
Craspedosoma Leach, Cylindrosoma Gray, Reasia Gray, and Cambala 
Gray,in the order named. Evidently the author did not base his 
family on characters now recognized as important, but no more did 
Koch, who included in “ Chordeumide” Campodes and Callipus, mem- 
bers respectively of the Iulide and Lysiopetalide. 
It would seem that there was less warrant for Latzel’s course from 
the fact that Humbert and Saussure had recognized and described® the 
family “ Craspedosomide,” though still including the Lysiopetalide as 
one of two tribes or sub-families ; indeed, it is entirely possible that the 
preference for“ Chordeumide ” was merely on the ground of brevity. 
There is, at least, ample justification for such a supposition in the fact 
that Latzel had previously changed the names of the families Pauro- 
podide and Eurypauropodide, alleging as a reason the similarity of 
the former with the ordinal name Pauropoda, and the “ horrible diffi- 
culty of pronunciation” of the latter. Priority aside, these reasons 
seem hardly sufficient to justify such family names as “ Pauwropoda 
agilia ” and “ Pauropoda tardigrada,” which Latzel offers as substitutes. 
But even if the improvement had been more marked there must still 
? Tulide : Leach, Berlese. 
Polydesmidæ; Newport, Gervais, Porat, Meinert. 
Lysiopetalidæ: Wood, Cope, Harger, Ryder, Packard. 
3 System der Myriapoden, pp. 49 and 119 
*The family “ Craspedosomade ” was published by J. E. Gray in the article on 
Myriapoda by T. Rymer Jones, in Todd’s Cyc. Anat. and Physiol., III, p. 546 
(1842). The author of the article specifically states that the arrangement of the 
Myriapoda there proposed was the work of Gray, published from his manuscripts 
and with his consent. Hence there is no apparent reason for citing the authority 
of Jones as Latzel and others have done. 
> Rev. et. mag. d. Zool. 2d series, XXI, p. 153 (1869). 
Mission Scient. au Mexique, Zool. VI, 2, p. 56 (1872). 
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