NATURAL SCIENCES OF PHILADELPHIA. 2So 



than any of the other species of the genus. The male is one of the finest en- 

 tomological prizes which will reward the collector in Western America. Diffens 

 from our other two species by the color, and by the base of the thorax being 

 less sinuate, whereby the posterior angles become more rectangular. 



Lachnosterna errans, fusco-ferruginea, oblongo-ovata, convexa, capite 

 fortiter haud confluenter punctato. clypeo fortiter marginato, fere integro, 

 thorace antice angustato sat dense punctato, lateribus angu'atis, longe oiliatis, 

 elytris haud costatis fortius punctatis, pygidio parce subtiliter punctato, pec- 

 tore longe villoso, unguiculis dente mediocri armatis, Long. '70. 



One male, Contra Costa, California ; Mr. J. Child. Resembles closely in 

 form and sculpture L. cephalica Lee, Journ. Acad. Nat. Sci. Phila., 2d 

 aeries, 3, 245, but the sides of the thorax are fringed with long hairs, angu- 

 lated at the middle and then narrowed with a concave outline to the apex : 

 the clypeus is scarcely emarginate. The antennae are 10-jointed, the club it 

 as long as the basal portion ; the penultimate ventral segment has a transverse 

 crest concave posteriorly, and finally the fixed spur of the posterior tibise is 

 very short, the moveable one about twice as long, curved, flattened and sub- 

 obtuse. 



Dichelonycha p aliens, breviuscula, testacea, parce pubescens, clypeo 

 reflexo, angulis rotundatis, thorace latitudine duplo breviore, apic.o fere trun- 

 cate, an. ice angustato, lateribus valde rotundatis, medio subangulatis, anguli? 

 posticis valde obtusis, confluenter dense punctato, elytris punctatis subcosta- 

 tis, antennarum clava nigro-picea. Long. -30. 



One specimen, Punto de los Reyes. Resembles D. testacea Kirby, but 

 is much smaller, comparatively wider, the clypeus less rounded at apex, the 

 thorax more rounded on the sides, with the posterior angles more obtuse. 



Adelocera rorulenta, rufo-picea, punctata, nigro-squamosa. squamisqu* 

 aureis parce conspersa, thorace latitudine paulo longiore, late profunde canali- 

 etrlato, ante medium magis angustato, lateribus rotundatis, angulis posticis 

 planis haud divergentibus, elytris depressis vix obsolete striatis, tarsorum 

 anticorum sulcis parum distinctis. Long. -59. 



Steilacoom, Dr. Suckley, one specimen. Resembles A. aurorata, and in 

 the absence of a specimen for comparison, was incorrectly referred by me to 

 that species (P. R. R. Expl.. xi. 18,) ; it is, however, less elongated, with the 

 posterior angles of the thorax not divergent, and the tarsal grooves on the 

 under surface of the prothorax are much less apparent. 



Dascyllus Davidsonii, fusco-piceus, dense pubescens, confertissime 



punctulatus ; thorace latitudine plus duplo hreviore, antrorsum angustato, 



lateribus rotundatis, basi late bisinuato, elytris striis approximatis, punctatis 



antice obliteratis, antennis valde serratis, articulo 3io sequenti sequali. Long. 



-48 -52. 



Punto de los Reyes, Mr. Davidson, to whom I take great pleasure in dedi- 

 cating this fine species. It differs from those previously described by the 

 strongly serrate antennae ; these organs are half the length of the body in the 

 female, and a little longer in the male ; the second joint is small, the third, 

 fourth and fifth are triangular, and nearly as wide as long ; the following ones 

 gradually diminish in breadth ; the eleventh is oval elongate and constricted 

 at the end. The last segment of the abdomen is marked towards the base 

 with a semicircular impression, with the concavity behind, as though it wert- 

 formed by the union of two segments. 



Charopu3 moerens, nigro-virescens, alutaceus. opacus, tenuissime pu- 

 bescens, thorace latitudine sublongiore, ovato, postice subangustato, marginc 

 pone medium anguste testaceo, postice transversim vage improsso, elytrit 

 (feminae) elongatis postice sensim latioribus, apice rotundatis, abdomine pauV* 

 brevi ribus. Long. '13. 



1859.J 



