AMERICAN COLEOrTERA. ^"'^ 



This species is the smallest of the series, and is known by the forni 

 of the thorax and the narrow margin. The males have the usual 

 sexual segment, and the posterior tibiae at tip are a very httle more 

 dilated than in the female. 



Occurs in South Carolina, Georgia and Florida. 



PROMETOPIA Erichs. 

 Mentum large, entirely closing the mouth beneath. Labrum nearly 

 semicircular. Mandibles prominent, bifid at tip. Antennal grooves 

 moderately deep, slightly convergent. Antennae slender first joint 

 stout, third very long, club elongate oval. Front not lobed at the 

 sides. Thorax deeply emarginate in front, sides explanate. Prosternum 

 flat tip not prolonged. Tarsi very feebly dilated. 



The males ha,ve an additional segment visible only beneath, re- 

 ceived in a slight emargination of the fifth ventral and similar to 

 that of Co/asfus. 



One species only occurs in our fauna. 



P sexmaculata Say.-Broadly oval, depressed, piceous, margins paler. 

 He^cl finZpunetulate. Thorax twice as wide as long, narrower m front, 

 fpex deep iv marginate, base truncate, sides feebly arcuate, h.nd angles rec - 

 Angular margins explanate, disc feebly convex not densely punctate w.tb 

 coarse and fine punctures intermixed. Elytra as w.de as long % or long r 

 ha wide 9, surface sparsely coarsely punctate, marg.ns pale d.sc p.ceous 

 ith Tn irregular humeral band and a spot at apical th>rd paler Body be- 

 Tath paler Ln above, sparsely punctate Length .0-4 '-'^; ^"^ "-• 



The males are always broader than the females, and haNc an 

 ;idaiti(mal segment as in Col<istii>i. 



Occurs from the Middle States to Missouri and iexas. 



PHENOL.IA Ericbs. 



Labrum feebly bilobed. Front not lobed over the insertion of the 

 .ntenn^ Antennae terminated by an abrupt club, first joint not auncu- 

 late grooves moderately deep situated under the eye, not convergent. 

 Mandibles bifid at tip, not dentate within. Tarsi not dilated. 



The males have a small additiomil segment visible only beneath 



'' TMs'tenus' has been united with Soronia by Mr. E. Reitter, but 

 the differences as far as our species is concerned seems not to warrant 

 this conclusion. The absence of the supra-antennal lobe of the front 

 to^^ether with the simpler form of the first joint of the antennae, it 

 bein^ merely thickened, not auriculate. are sufficient in th.s family to 

 retain Phe.olia as distinct. The mandibles are, moreover, bifid at tip 

 and not simple, resembling in this respect Fromctojna. 



n,q\ SEPTEMBEH, 1879. 



TRANS. AMER. ENT. SOC. VII. (-^^ J 



