552 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 94 



offered by a careful comparison of the structural details of the two 

 species. Such proof is here offered in the comparison of species 

 claimed as synonyms by Meehean, but it results in proving their 

 validity rather than their synonymy. 



In all Meehean keyed out 26 species. Of these one needed a new 

 name, A. diversus being given to Meehean's A. inaculosus; other 

 material was wrongly identified as A. salminei Kr0yer, which con- 

 sisted in part of A. nattereri and A. paidensis both of Wilson. In- 

 cluding the latter, the present author reestablishes the validity of 

 eight species that Meehean put into synonymy. This gives us 37^ 

 species of Argidus for which a diagnostic key is given on p. 576. 



ARGULUS INDICUS Weber 



Plate 22, Figures 34-39, 48 



Argulus indicus Weber, 1892, p. 544, fig. 1.— Kampen, 1909, p. 447, figs. 5, 6. 



This Sf)ecies was first established upon female specimens from the 

 coast of Java by Max Weber and afterward by P. N. Kampen. Both 

 descriptions were very meager, with one figure by Weber and two 

 by Kampen. A single female was obtained by Dr. H. M. Smith from 

 the skin of a fighting fish (Betta) at Bangkok, Thailand, and sent to 

 the present author, by whom it was more fully described (Wilson, 

 1927). Dr. Smith later obtained 10 females and 11 males from the 

 skin and fins of Trichopodus fectoralis at Bangkok. As these are 

 the first males to be collected they are fully described and figured and 

 a single specimen of each sex is U.S.N.M. No. 78896, the male being 

 the allotype. 



Male. — Carapace ovate, considerably narrowed anteriorly, with 

 broad lateral lobes, which fall slightly short of the abdomen, just 

 reaching it or slightly overlapping it, no two specimens agreeing 

 exactly in relative length. Cephalic area broadly triangular, dis- 

 tinctly separated from the rest of the carapace and projecting a little 

 anteriorly. The two median ribs are curved and bifurcate at their 

 anterior ends like those of the female, and the ribs in the lateral lobes 

 also are arranged similarly. The respiratory areas are divided into a 

 very large posterior portion and a comparatively minute anterior por- 

 tion. Again this is like the arrangement in the female except that 

 here in the male the large posterior portion is considerably curved in- 

 ward and its anterior end is more or less truncated instead of evenly 

 rounded. The compound eyes are relatively larger than those of the 



8 Two species overlooked by Meehean, and not included in Wilson's key. are .4. cubentis 

 Wilson and .4. rhamdiae Wilson. A. cubensis was taken by Dr. L. Howell Rivero from the 

 gills of a fresh-water cichlid in Cuba (Wilson, 10.S6a). A. rhamdiae was taken by Dr. A. S. 

 Pearse (Wilson, 1936b) from the skin of a species of Rhamdia caught in one of the cenotes 

 of Yucatan. — Editor. 



