CURCULIONID.E — ('UUCULIONlN.i: — I'ltlONOMKUINI. 119 



I'liloNOMKUCS Schuulu-rr. 



To this iiKinotypic jjeiius, foiimled on a species froru the Atlantic States, 

 I can no*- aild a sin<>-k' fossil species from Florissant. 



Peionomerus irvingii. 

 I'l. 111. Fiii-. 12. 



A large stout-bodied form. Tlic lnad and |)rothorax together, as 

 viewed above, form a nearly equiangnlar tiiauL;ic witii rounded sides, the 

 head only less heavily punctured than tlif prothorax where the punctures 

 are close and rather coarse; Ix-ak inodcratcK- stout, licntlv arcuate, as loiiy- 

 as the prothorax (not contracted at base as the tignrf wuiild indicate). Ely- 

 tra considerably broader than the base of tlie prothorax, with mmnlcd 

 humeri; thev are but little more than half as long again as broail, apicall\- 

 divergent .so as to expose the pygidium, tlie stria- pretty .sharp and mod- 

 eratel}' deep with not very distinct, distant punctures, the interspaces Hat 

 with large iiregular, distant punctures, ajjproxiraately disposed in two i-ows 

 in each interspace. 



Length, excluding rostnuii, 4-7"""; rostrum, l-35°""; Avidth of base of 

 thorax, 2-3""": of elytra, 3-2'""'. 



Florissant, Colorado. Two specimens, Nos. 8fi27, 8042. 



This in.sect is named in honor of Dr. Kolaud D Irving, of Wisconsin, 

 my colleague on the U. S. Geological Survey. 



Tribe TYCHllNI. 



This small tribe is ver}- similarly represented in the Tertiaries of 

 Europe and America. In the former are found one species of Sibynes, at 

 Aix; and two of Tychius, at Rott and Rrunstatt : in the latter one of 

 Sibynes and two of Tychius, all at Morissant; in no otla-r tribe of Rhyn- 

 chophora is there such a close similarity. 



TYCHIUS Germar. 



This genus is numerou.s in species of small size ami is widelv sjjrcad, 

 especially in the northern hemisphere and in the Old World. North America 

 possesses only seven species, found in the ^lississippi valley and westward. 



