Casey — A Revision of the American Paederini. 75 
terior strongly dilated. Body moderately small, rather stout, notably 
convex, the head moderately small, arcuato-truncate at base, the eyes 
well developed, the labral lobes somewhat large, subcircularly rounded ; 
maxillary palpi rather long and thick but not inflated; gular sutures 
rather widely separated but almost parallel, very feebly diverging from 
near the apex tothe base; antennae very long, slender and filiform; 
neck half as wide as the head; prosternum moderately short, the pro- 
thorax broad and short, oblong, the angles moderately defined; elytra 
moderate, slightly larger than the prothorax, the punctures lineate; 
abdomen broad, densely dull; legs rather slender, Western America. 
Paralathra 
Hind tarsi very slender, filiform, the two basal joints relatively much 
elongated, the first frequently a little longer than the second. Body 
small, slender, subparallel and convex, the head rather well developed 
though always uarrower than the elytra, the eyes moderately large » 
the labrum short, very broadly emarginate throughout the width, the 
lobes broadly, obliquely truncate, narrowly rounded externally; gular 
sutures moderately distant, very feebly diverging posteriorly and gene- 
tally obliterated, being tracea dle only by the punctuation; maxillary 
palpi rather long and stout; antennae moderate in length and generally 
rather thick, the joints obconic; neck distinctly less than half as wide 
as the head; prothorax rather small, oblong, with the angles distinct; 
elytra variable but always much wider than the prothorax and never 
shorter, the sculpture always very sparse and lineate; abdomen slender, 
the punctures not very dense. America, except the Pacific coast fauna. 
Linolathra 
22 — Body more or less fusiform, moderately small in size and of the usual 
convexity; head small, arcuato-truncate at base, the eyes generally 
well developed, the labral lobes wide, subcircularly rounded ante- 
riorly; gular sutures widely separated, more or less rapidly diverging 
from near the apex to the base; palpi more or less short and thick; 
neck half as wide as the head; antennae moderately long, rather thick, 
the joints obconic; prothorax moderately large, oblong, the angles gen- 
erally rather distinct; elytra always well developed, longer and wider 
than the prothorax, the punctuation linear; abdomen rather broad, 
minutely, very densely punctate and densely dull as a rule; legs mod- 
erately long and slender. America............ceee+.---- Lathrobiella 
Body parallel and rather convex, nearly as in Lathrobioma, small in size, the 
head well developed, as wide as the elytra, broadly arcuato-truncate at 
base, the eyes small in size; labrum short, broadly emarginate throughout 
the width, the lobes rather narrowly rounded externally; palpi moderately 
long and thick ; gular sutures widely separated, arcuate, distinctly diverg- 
ing from near the apex to the base, where they are separated by a fourth 
or fifth of the total width; antennae moderate in length, very thick, with 
the joints but little longer than wide; neck half as wide as the head; 
prothorax rather elongate, suboblong, with the angles distinct; elytra 
small, shorter than the prothorax, the basal angles as usual and not 
rounded; abdomen not densely punctulate, the segments not at all 
impressed at base; legs moderate in length, somewhat slender. East- 
CIN AMETICA. .ocee vecccccccccccccescccccccsceceseccccccs Microlathra 
