38 SAHLBERG, TSCHUKTSCH-HALFÖNS INSEKTFAUNA. 
Var. n: supra viridi-2enea, prothorace elytrisque dorso late 
nigro-ceruleis, elytrorum interstitiis alternis elevatis, pedibus 
Nigro-&eneis. 
Var. o: supra cyanea, limbo viridi-eenea, elytrorum inter- 
stitiis plerisque insequaliter acute elevatis, pedibus nigro-geneis. 
Flera exemplar togos vid. Irkajpi, Pitlekaj, Idlidljaomt 
retlen, Koljutschin bay och Rirajtinop i september, juni och 
juli. Från Irkajpi medfördes äfven larver. 
Utbredning. Äfven funnen i Taimyrlandet. 
36. Chrysomela magniceps n. sp. Oblonga, angustior, 
postice dilatata, supra convexa, viridis vel ceerulea, nitida; 
capite magno, vertice canaliculato, antennarum articulo primo 
vel duobus primis subtus rufo-maculatis, penultimis vix trans- 
versis; prothorace medio parce subtiliter punctato, callis late- 
ralibus fossa profunda terminatis; elytris satis fortiter pun- 
ctato-striatis; mesosterno ruguloso, excavatione antice carina 
obsoletissima terminata. Long. 2! lin. 
Vär. a. Supra eeruleo-vitescens. 
Var. b: supra obscure violaceo-cerulea. 
Precedenti simillima et valde affinis; sed differre videtur 
statura angustiore, capite majore, vertice canaliculato, protho- 
racis disco paullo subtilius et remotius punetato punctisque 
in stris elytrorum profundioribus. — Caput prothoracis lati- 
tudine dimidia basali paullo latius, minus dense distincte 
punctatum, vertice subtiliter canaliculato, clypeo linea suban- 
gulata satis fortiter impressa discreto; palpis nigris, articulo 
ultimo' penultimo : fere breviore, apiee late truncato. Antennse 
prothoratcis basin parum superantes, nigre, tenuiter griseo- 
pubescentes, articulo primo dilatato, subtus anguste rufo-macu- 
lato, secundo vel unicolore, vel subtus macula parva rufa no- 
tato; 3:0 contiguis paullo longiore, 6:0 ceteris breviore, distinete 
transverso, 7—11 clavam indistinetam formantibus, sensim 
paullo longioribus, 7:o0 distincete, 10:o0 haud transverso, ultimo 
hoc dimidio longiore, ovato. Prothorax basi longitudine duplo 
latior, apicem versus leviter angustatus, angulis anticis produ- 
ctis, anguste rotundatis, supra modice convexus, subtiliter remote 
punctatus, fossa laterali postice profunda, apicem versus obsole- 
scenti. HScutellum triangulari-rotundatum, obsolete punctatum, 
ceruleum. HElytra basi prothorace parum latiora, postice dilatata, 
convexa, prothorace triplo et dimidio longiora, satis fortiter pun- 
ctato-striata, striis preter marginalem novem pretereaque pun- 
