56 MEMOIRS ON THE COLEOPTERA 



region toward the scutellum, the punctures still coarser than in the 

 preceding, rather numerous, not at all coarser near the lateral 

 margins and very distinct in the less pubescent basal region, the 

 short pale hairs forming two very indefinite fasciae; abdomen mi- 

 nutely, very densely sculptured and dull, the few scattered punctures 

 unusually small and difficult to observe. Length 1.3 mm.; width 



0.75 mm. Texas (locality not recorded) lanosus n. sp. 



7 Oval, convex, shining, black above, piceo-rufous beneath, gradually 

 though rather obtusely ogival at tip, the integuments polished, 

 without any form of ground sculpture; prothorax rather narrower 

 than usual, but little more than twice as wide as long, the converging 

 sides straight, the surface very even, not impressed medially and 

 with rather well separated punctures throughout but so minute as 

 to be invisible except under great enlargement; elytra a fourth 

 longer than wide, widest rather before the middle, the sides rounded, 

 gradually slightly less so and converging posteriorly and a little 

 more rounded at the humeri, the punctures small and widely spaced, 

 gradually slightly larger sublaterally, becoming virtully obsolete 

 near the suture, on the lower part of the flanks basally and on the hu- 

 meral swelling, the impression along the finely reflexed lateral margin 

 with a widely spaced series of Very moderate punctures; short hairs 

 only moderately dense, fulvo-cinereous, the longer hairs rather 

 numerous but inconspicuous; abdomen more shining than usual, 

 the minute sculpture finer and less dense, the punctures however 

 much coarser and more numerous than in any other, perforate, 

 separated by from once to twice their diameters throughout, except 

 a moderately narrow area along the middle, where they become 

 fine and sparse. Length 1.3 mm.; width 0.78 mm. Florida (Ca- 

 pron). [Limniclms (Limnichoderus} punctiventris Csy., Ann. N. Y. 

 Acad., 1890, p. 159] punctiventris Csy. 



There is, in all the species of this genus, a smooth shining and 

 impunctate apical margin of the pronotum; it is delimited from the 

 rest of the surface by an entire and very even transverse series of 

 minute close-set asperulate punctures. This apical margin so 

 delimited is not observable in any species of Limnichus that I have 

 examined, and it forms another important structural difference 

 between the two genera. Being apical and not submedial on the 

 disk of the pronotum, it is not in any way associable with the 

 transverse series of asperate punctures noticed by Dr. Sharp in 

 some tropical types and referred to above under Limnichalia, and 

 in Limnichoderus no medial transverse line of any kind is ever 

 traceable. Punctiventris and naviculatus are very distinctly char- 

 acterized species, at opposite extremes in regard to peculiarities 

 of abdominal sculpture though mutually very consistent otherwise. 



