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 to the 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. 



Paralatkra 



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 narrower 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 traceable 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 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- 

 ern America Microlathra 



