NEW SYNONYMY AND NEW SPECIES OF AMERICAN BARK BEETLES ( COLEOPTERA : SCOLYTIDAE ) ^ Stephen

— New synonymy is proposed as follows: Pityokteines Fuchs { = Orthotomides Wood), Araptus foveifrons (Schedl) { = interjectus Wood), n. comb., Cryptocarenus seriatus Eggers { = bolivianus Eggers), Hylastes gracilis LeConte {=asper Swaine), Procryphalus utahensis Hopkins {=aceris Hopkins), Scolytodes maurus (Blandford) {=Hexacolus ellipticus Eggers), Scolytus hermosus Wood {=sylvaticus Bright), Xyleborus adelographus Eichhoff { = vitiosus Schedl), Xyleborus catulus Blandford {=intricatus Schedl), Xyleborus nepos Eggers {=signatus Schedl), Xyleborus titubanter Schedl {=dissidens Wood). The following species and subspecies are named as new to science: Cnesinus electus (Costa Rica), C. pilatus (Mexico), Hylastes asperatus (New Mexico), Scolytus torulus (Costa Rica), S. laetus (Mexico), Scolytodes amabilis and S. lepidus (Mexico), S. obesus (Panama), Pseudothysanoes concentralis and P. tumidulus (Mexico), Thysanoes tuberculatus (Mexico), Pityokteines mystacinus (Washington), Ips pilifrons subsp. thatcheri (Nevada), Araptus attemiatus (Mexico), A. fossifrons (Mexico, Guatemala), Amphicranus parilis (Mexico), Corthylus cecropii (Costa Rica). On the following pages several newly discovered cases of synonymy and 1 7 species and 1 subspecies new to science are presented for American Scolytidae. The specific synonymy is presented in alphabetical order for convenient reference. The species new to science represent the genera Cnesinus (2), Hylastes (1), Scolytus (2), Scolytodes (3), Pseudothysanoes (3), Thysanoes (1), Pityokteines (1), Araptus (2), Amphicranus (1), and Corthylus ( 1 ) . The new subspecies is of Ips pilifrons. The new species are from the following countries: United States (2), Mexico (10), Costa Rica (3), Panama (1), Mexico and Guatemala ( 1 ) . The new subspecies is from the United States (Ne-