396 Field Museum of Natural History — Zoology, Vol. VII. 



Chevrolat's varieties A, B, C, and D were described from Cuba; in the 

 var. C the prothorax is red, the elytra bordered with yellow; the 

 variety D is similar, but the suture is bordered with yellow. 



Occurs in Cuba, Florida, Georgia, New Jersey, Pennsylvania, 

 District of Columbia, Ohio, Indiana, Michigan, Illinois, Iowa, Mis- 

 souri, Kansas, Louisiana, Texas, Lower California, and Mexico. 



The principal distinguishing characters of the two preceding 

 species may be briefly summarized as follows: 



a. Antennae black; sides of prothorax sinuate, widest at basal 

 fourth, narrowing to apex, posterior angles obtuse. (Prono- 

 tum pi. VI, fig. 31.) damicornis. 



aa. Antenna red, club black; sides of prothorax nearly striaght 

 and parallel, not convergent towards apex, posterior angles 

 rounded. (Pronotum pi. VI, fig. 32.) texana. 



Prionodera^ gen. no v. 



Body narrow, cylindrical. Head narrow; eyes not prominent, 

 rather finely granulate, feebly emarginate in front ; antennae 1 1 -jointed, 

 club three-jointed, slightly enlarged and compact. Apical joints of 

 labial palpi large, dilated; apical joint of maxillary palpi narrow, 

 cylindrical, obtuse at apex. Thorax with the sides nearly straight, 

 feebly obliquely narrowing from the middle to the base; the base 

 strongly reflexed; disk convex; posterior angles distinct, minutely 

 obtuse; lateral flanks dilated, the coarse sculpture giving margin a 

 serrate aspect. Elytra elongate, parallel; sutural region feebly de- 

 pressed near base ; basal portion deeply, coarsely punctured. Legs mod- 

 erately long; tarsi four-jointed; the anterior pair moderately dilated, 

 the median and posterior pair narrow, furnished with membranous 

 lobes; ungues simple. Type P. tantilla Lee. [Clerus (Thaneroderus) 

 taniilhis Lee], Smiths. Misc. Coll., vi, 1865, p. 96. 



The characters given above show that this genus should cuter 

 the subfamily Corynetini, where it is best placed near the South 

 African genus Doluhopsis Gorh. 



It is impossible to understand why Ur. LcConte associated the 

 type of this genus with Clerus and later with Thancroclcrus, as several 

 of the characters mentioned in the original description clearly dem- 

 onstrate that this species is not assignable even to the subfamily 

 Clerini. 



/'. tantilla has been recorded only from Washington, D. C, and 

 Alabama. The specimen upon which the jtrcscnt generic description 



» Ttftiatv, serra; Itlffiy collum. 



