212 THE CANADIAN ENTOMOLOGIST 



7. Lachnus Burmeister, v 



Syn. Lachniella Del Guercio. 

 Type L. fasciatus Burm. 



Since no type had previously been established for Lachniella, and since the 

 genus contained a number of diverse species the placing of it thus, according to 

 the writer's reasoning, indicates /a5a'a/;^5, one of the included species of Lachniella 

 as its type. Otherwise there would be no reason for so placing the genus. 

 In his most recent paper (1919) Wilson has used Lachniella in quite a different 

 sense, and would exclude fasciatus from the genus. This species, the present 

 writer contends, is the only one that has in any way been suggested as type of 

 Lachniella, and he believes that it is the type of the genus. Otherwise the 

 genus is without a type. 



This leaves the genus Lachniella of Wilson without a name, and to this 

 genus we give the name Wilsonia and fix Lachniella gracilis Wilson as its type. 

 The different genera with designated types will thus stand as follows, at least 

 until some definite ruling has been made changing the present ligitimate type 

 of Lachnus. 



Genus Lachnus Burm. — Type Lachnus puncMiis Burm. 



Genus Lachniella Del Guercio — Type Lachnus fasciatus Burm. 



Genus Wilsonia Baker — ^Type Lachniella gracilis Wilson. 



References. 

 1835. Burmeister — Handbook Entom. II, p. 91. 

 1840, Westwood — Int. Mod. Class. Insects II, Synopsis, p. 118. 

 1863. Passerini — Aphidida? Italics, p. 62, 



1908. Mordwilko— Ann. Mus. Zool. de L'Acad. Imp. Sci., Vol. XIII. 



1909. Del Guercio— Redia, Vol. 9, p. 286. 



1910. Wilson— Ent. News, Vol. XXI, p. 147. 



1911. Wilson— Ann. Ent. Soc. Am., Vol. IV, p. 54. 

 1919. Wilson— Can. Ent., Vol. LI, p. 18. 



NEW COLEOPTERA. VIII. 



BY H. C. FALL, TYNGSBORO, MASS. 



The receipt of a very distinct new species of Ochthebius from California 

 which it is desirable to make known, affords the opportunity for recording one 

 or two errors in the literature of this genus. Descriptions of a few other new 

 species are added. All types are in the author's collection. 



Ochthebius martini, sp. nov. 



Form very broad, aeneo-piceous, side margins of elytra explanate through- 

 out and paler in colour. Labrum deeply triangularly emarginate. Prothorax 

 one-third wider than long, widest at anterior third, sides arcuate in basal half, 

 then suddenly deeply sinuate, nearly as in rectus (See Horn's figure), transparent 

 border extending from apex to base, becoming very narrow in front of the middle, 

 the sides strongly obliquely convergent from the point of maximum width, 

 feebly arcuate to nearly straight basally; median line deep and entire; discal 

 fovecC rather small and not very conspicuous, well separated, the posterior 

 narrow and about twice the length of the anterior; lateral impressions deep and 

 subparallel sided ; surface rather densely, coarsely, evenly punctate, distinctly 



alutaceous throughout between the punctures. Elytra not more than one- 

 August, 1019 



