Casey — A Revision of the American Paederini. 27 
abdomen narrower than the elytra; legs slender, the hind tarsi long, only 
slightly shorter than the tibiae, the basal joint not quite as long as the 
next two but longer than the last. Europe...............*Cryptobium 
11—Form narrow, subfusiform, the head small and much narrower than 
the elytra, only feebly convex, the integuments polished and devoid of 
minute sculpture throughout, the punctures moderate in size, not very 
close-set and simple; head oblong, the sides parallel or feebly converg- 
ing behind the eyes to the broadly rounded basal angles, moderately 
narrowed before the eyes, which are rounded behind, prominent and 
situated well before the middle; post-ocular areolae distinct, the sur- 
face between them sometimes. tumid; labrum nearly as in Crypto- 
bium; basal joint of the antennae moderate; neck barely two-fifths as 
wide as the head, mentum trapezoidal, coriaceous only at apex, deeply 
impressed along the basal margin; gular sutures becoming extremely 
approximate behind the middle; prothorax very narrow and elongate- 
oval, parallel, much narrower than the head; elytra almost twice as 
wide as the prothorax and very much longer, notably elongate, parallel, 
the suture strongly beaded; abdomen narrow, the segments feebly im- 
pressed at base; legs rather short, very slender, the hind tarsi notably 
short, the first and fifth joints subequalin length and much longer than 
the others which are relatively more elongate than usual. Southern 
WOEEH  AMIGTICN o's wi ck coe cs Cec deies See Kive bes covnsecee see's DSHRCtRS 
12 — Body parallel, rather convex, more or less densely and coarsely but 
simply punctate; head oblong-elongate, usually parallel at the sides, 
with broadly rounded basal angles; neck broad, about three-fifths as 
wide as the head; eyes well developed, convex and prominent, situated 
distinctly before the middle of the length; basal joint of the antennae 
as long as the next four combined, the joints not constricted at base; 
labrum short, truncate, bidenticulate, the teeth separated by a rounded 
and rather shallow median sinus of moderately large size; post-ocu'ar 
foveolae large and well developed, rather approximate, the surface 
between them longitudinally tumid; membranous lobes of the 
ligula narrow, well separated, arcuate toward each other, the basal 
parts corneous as usual; mentum large, trapezoidal, flat, the apical part 
coriaceous, the dividing line posteriorly arcuate; second maxillary 
palpal joint sparsely setulose, the third rather longer than the second, 
moderately stout, obconical, with the apex slightly narrowed, the sur- 
face dull in lustre, finely and closely pubescent, the fourth joint smaller 
than usual, acutely conical; prothorax oblong, parallel, narrower than 
the head; elytra parallel, wider than the head and usually longer than 
the prothorax, the suture strongly beaded; abdomen parallel, nearly or 
quite as wide as the elytra, the segments distinctly impressed at base; 
legs slender, moderate in length, the hind tarsi long, slender, of the 
usual form, the basal joint as longas the next two and longer than the 
DEL: AMDON «ike aSoe pieeaccheaces acces boa co bies dae bu cs ---*Monocrypta 
The majority of the above genera being foreign to our 
territories, it is necessary to remark upon those thus indi- 
cated above before proceeding further : — ; 
