116 [June, 



Oregon, Col. McCall ; (Sitka, Mannerheim.) The fact that the generic name 

 ceases to be applicable to certain species now admitted into the genus, is 

 hardly sufficient to warrant us in substituting the name proposed by Erichson, 

 for that under which this group was first established. 



Simplocaeia Steph. 



1. S. tessellata, elongato-ovalis, nigro-aenea, nitida, convexa, utrinque 

 subacuta, parce cinereo-pubescens, thorace subtiliter punctulato, elytris striis 

 sat profundis, apice obsoletis, suturali integra, interstitiis parum convexis, obso- 

 lete punctulatis, maculis cinereo-pubescentibus subtessellatis, pedibus piceis, 

 tarsis pallidioribus. Long. *13. 



Byrrhus tessellatns Lee. Agassiz' Lake Superior, 224. 



One specimen, found on the Northern shore of Lake Superior. The reference 

 of this species to Byrrhus, by me, is another instance of the confusion resulting 

 from the description of new species of insects of various groups, before the groups 

 themselves have been submitted to careful study. 



2. S. nitida Motsch. Bull. Mosc. 1845, 2, 362; Mannh. ibid. 1S52, 342. 

 Russian America; unknown to me. 



Amphicyrta Er. 



1. A. chrysomelina, aptera longius ovata, antice angustior, piceo-aenea, 

 nitida, convexa, dense subtiliter punctulata, tarsis piceis, tibiis anticis extrorsum 

 obtuse angulatis. Long. '35. 



Erichson, (per Steffahny) Germ. Zeitschr. 4, 40. 



Oregon, collected by the late J. K. Townsend, and given me by Mr. Will cox. 

 Larger and narrower than the following species. 



2. A. d e n t i p e s, aptera, ovata, antice angustior, piceo-aenea, nitida, fere 

 gibba, dense punctulata, subtilius in thorace, antennis palpis, pedibusque rufo- 

 piceis, tibiis anticis extrorsum subacute angulatis. Long. '25 28. 



Erichson, (per Steffahny) Germ. Zeitschr. 5, 40. 



Eucyphus hybosoroides Mannerheim, Bull. Mosc. 1843, (teste Mann. ibid. 

 1852, 342.) 



Abundant at San Jose, California, under stones, in March; found also occa- 

 sionally at San Francisco. The synonym cited from Count Mannerheim, 

 although suspected by me several years ago, and mentioned in my correspon- 

 dence with scientific friends, is founded upon a description so very inaccurate, 

 from typographical errors, that the admission of the author himself was neces- 

 sary to establish it. 



3. A. s i m pi ic ip e s Mannh. Bull. Mosc. 1852, 342. Russian America; 

 unknown to me. 



Limnichus Latr. 



1. L. olivaceus ,ovalis,convexus, nigro-aeneus, pubedensa olivacea cinerea- 

 que sericeus, confertim sat grosse punctatus, thorace subcanaliculato lateribus 

 rectis, basi media longius lobata, antennis pedibusque nigris, prosterno profunde 

 sulcato. Long. -10. 



Illinois, Mr. Willcox. This species closely resembles the nex% but is larger, 

 the form is more elongated, the punctures are larger and somewhat less dense. 



2. L. pu n ct at u s , ovalis convexus, aeneo-niger, pube densa olivacea seri- 

 ceus, in elytris cinereo vix variegatus, punctatissimus, thorace subcanaliculato, 

 lateribus fere rectis, basi media longius lobata, antennis pedibusque nigris 

 prosterno profunde sulcato. Long. *07 '08. 



Pennsylvania, June, abundant. 



3. L. obscurus, ovalis, convexus, seneo-niger, pube olivacea cinereaque 

 subsericeus, sat dense punctatus, thorace subcanaliculato, lateribus rectis, basi 

 media latius lobata, prosterno profunde sulcato, antennis pedibusque nigris, 

 Long. *10. 



