H. ('. FALL. 117 



Males with the front tibiae alone toothed, the femora unarmed. 



moiitauus. 

 Tempora distinctly shorter, about i the length of the eyes; discal costae 

 of the pronotum more strongly developed ; no external sexual modi- 

 fications. 

 Seventh (humeral) interval of elytra usually very distinctly carinate to 



beyond the middle costicollis. 



Seventh interval of elytra not carinate, though usually more or less 

 elevated behind the humeri liratus. 



Mannerhei m's fulvipennis, cinnamopterus and curtulus are quite 

 certainly members of this genus. The two first named are possibly 

 identical and may be (as has been assumed) the same as costicollis 

 Lee. I have seen nothing that appears to fit the description of 

 curtulus; its reference to Lathridius is less certain than is that of 

 the other two. 



L.. productus Rosenh. — At once distinguishable from every other known 

 species of our fauna by the series of rather long, erect hairs upon each elytral 

 interval. As compared with liratus, the size is smaller, the tempora longer than 

 half the diameter of the eye; the thorax scarcely longer than wide, the front 

 angles more strongly lobate, with a second marginal lobe a little behind the 

 angles; the humeral interval costate to beyond the middle. Length 1.7-1.8 mm. 



Hub. — Belon gives among' his localities "Amerique Septentrio- 



nale." I have seen no native specimens. 



L. lartlarius De Geer. — This common European species has been reported 

 from our fauna only from the Queen Charlotte Islands. It may be recognized 

 by the large size — 2.3 mm. or more— and by the elytra being subacuminately pro- 

 duced beyond the tip of the abdomen, their apices narrowly rounded. The punc- 

 tures of the elytral series are less coarse than in liratus, and are much finer apically. 

 The third interval is a little prominent toward the base, the seventh not at all 

 elevated. In the male all the tibise are curved, minutely acutely dentate within 

 near the apex, and finely serrate along the internal margin in about the apical 

 half, these characters being most pronounced on the front tibia?. (PI. Ill, fig. 10). 



\i. breviclavus sp. nov. — Robust, reddish brown, the prothorax darker. 

 Antenna? shorter Than in liratus, the outer joints of the funicle less elongate, the 

 ninth about as wide as long; club 2-jointed. Prothorax nearly as wide as long, 

 not much narrowed at middle, the surface densely rugosely punctate, the costas 

 less sharply defined than in liratus. Elytra broadly oval, the strial punctures 

 less coarse, especially toward the apex, than in liratus: the seventh interval dis- 

 tinctly carinate from the humerus to a little beyond the middle. (PI. Ill, figs. 

 11 and 11a). 



Hab. — Michigan (Grand Ledge) ; Long Island. 

 Two examples only are at hand, in which there are no apparent 

 sexual characters. Among the species at present known in our 

 fauna, this is at once recognized by its 2-jointed antennal club. 



TRANS. AM. ENT. SOC. XXVI. NOVKMBER, 1899. 



