Casey — A Revision of the American Paederini. 4} 
ventral — otherwise unmodified. Length 6.0 mm.; width 0.8 mm. 
Florida and Lowisianas 66s. ccce cies cuccccesecescccceccssllgupre Lec, 
24— Form stouter than in lugubre but equally small in size, much less 
parallel, polished and deep black throughout, rather convex, the legs 
pale flavo-testaceous, the antennae black with the two basal joints 
rufous; head elongate, much narrower than the elytra, the eyes moder- 
ate in size and prominence, anterior; punctures sparse and moderately 
coarse; prothorax elongate, distinctly narrower than the head, the sides 
subparallel and feebly arcuate, slightly narrowed toward apex, the 
latter being sensibly narrower than the base; punctures rather coarse, 
not very close-set; elytra well developed, elongate, parallel, two-fifths 
wider and a third longer than the prothorax, the punctures moderately 
coarse and close-set and in great part serial in arrangement; abdomen 
much narrower than the elytra, the punctures strong but rather sparse. 
Male with a short transverse setose fold behind the middle of the second 
ventral, the third with a very minute discal fold, the lobe unusually 
narrow, rather acutely triangular, not extending to the apex of the 
fourth and occupying apical fifth or sixth of the width; sixth obtusely 
rounded at tip; female not at hand. Length 6.7 mm.; width 1.08 mm. 
Florida. [=parcum Lec.]....se.ee cece ceeees sees eeeee ODliqaum Lec. 
The arrangement proposed above may not give a succession 
so truly in accordance with natural affinity as that based upon 
male structural modifications, but it is thought that the char- 
acters employed, together with variations of thecolor scheme, 
are sufficiently radical and constant to enable the student to 
place any specimen he may have at hand, irrespective of sex. 
It is possible, for example, that parallelum may be more 
closely allied to floridanum than to coloradense or arizonense, 
and it was probably by a hasty examination of the sexual 
characters alone, that Dr. Horn was led to the conclusion that 
it was identical with floridanum; the form, coloration and 
sculpture are, however, altogether different, and, other than the 
similarity in type of sexual characters, there is no close rela- 
tionship between these two species. The name proximum was 
applied to one of those rather perplexing variations having 
the elytra less elongate, but it probably does not differ even 
subspecifically. 
At Austin, Texas, I collected a very large series of the 
widely distributed pimerianum, in order to form an ideaof the 
extent of specific variation and find that this is rather surpris- 
ing and unusual, some of the very small depauperate individ- 
uals being proportionately more slender, with the head 
