DESCRIPTIONS OF NEW SPECIES. 139 



ISOMIRA MPLS. 



425. I. qiiadristriata. Nigro-picea, vel testaceo-picea, subnitida 

 dense sericeo-pubesceus, thorace latitudiue duplo breviore, lateribus 

 rotundatis, basi bisinuata tenuiter marginata, angulis posticis rectis, 

 cum capite dense subtiliter punctate; elytris dense subtiliter punctatis, 

 striis obsoletis, duabus internis pone medium distinctis ; antenuis fuscis 

 corporis dimidio longioribus, tenuibus ; pedibus ferrugineo-testaceis, 

 femoribus ssepe infuscatis. Long. -24 -26. 



Cistela quadristriata COCPEK, Canadian Naturalist, Feb. 1865, p. 62. 



Lake Superior, Canada, New York, Georgia, Missouri. A 

 widely diffused and not uncommon species, having the upper 

 surface nearly as finely punctured as Cistela sericea, from which 

 it is at once distinguished by the more broadly triangular, sub- 

 cultriform last joint of the maxillary palpi. 



It is with some hesitation that I refer this species to Isomira, 

 the outer side of the last joint of the maxillary palpi being in /. 

 antennata twice as long as the apical side, while in our species 

 the difference in length is not very great. I do not observe a 

 complete uniformity in the form of the part in question in those 

 genera of which I have examined several species, and therefore 

 cannot consider the difference as sufficient to warrant me in pro- 

 posing a new generic name. 



In one specimen, from New York, the inner side of the last 

 joint of the maxillary palpi is distinctly bisinuate, but I observe 

 no other character, except that the head and thorax are black, 

 and the elytra paler and more finely punctulate than in the other 

 specimens ; I have mentioned it in the List as /. velutina. 



MYCETOCHARES LATE. 



426. M. fraterna. Nigra nitida, tenuiter parce pubescens, tho- 

 race transverse, latitudine duplo breviore, lateribus valde rotundatis, 

 disco remote subtiliter punctato ; elytris thorace haud latioribus sub- 

 tiliter punctatis, versus suturam obsolete bistriatis, macxila subbasali 

 rufo-testacea ornatis ; subtus rufo-picea, ore antennis pedibusque rufo- 

 testaceis, ssepe paulo infuscatis, coxis anticis prosterno separatis. Long. 

 24 -26. 



Cistela fraterna SAY, J. Ac. Nat. Sc. Phila. Ill, 270 ; ed. Lee. II, 159. 

 Stigmatoma fraterna LEC. Class. Col. N. America, 244. 



Middle States ; under the bark of Populus dilatata. The 

 thorax is vaguely impressed each side of the base, and more 



