NEW SYNONYMY AND NEW SPECIES OF AMERICAN BARK BEETLES (COLEOPTERA: SCOLYTIDAE), PART IV' Stephen L. Wood" Abstract.— New synonymy is proposed as follows: Pityophthorus Eichhoff ( = Pityophthoroides Blackman), Scolytodes Ferrari { = Ctenophorus Chapuis), Araptus pallidus (Blackman), n. comb. (? = Neodryocoetes portori-censis Schedl, Neodryocoetes devius Schedl), Corthylus letzneri (Ferrari) ( = CorthyIus strigilatus Eggers, Corthylus columbianus Schedl, Corthylus ater Schedl), Corthylus spinifer Schwarz { = Corthylus guayanensis Eggers), Hy-pothenemus brunneus (Hopkins) { = Hypothenemus cryphalomorphus Schedl, Stephanoderes bituberculatus Eggers), Monarthrum parvum (Eggers) { = Monarthrum praeclarum Wood), Phloeoborus punctatorugosus Chapuis { = Phloeoborus breviusculus Chapuis), Phloeotrihus pilula Erichson { = Phloeotribus australis Schedl), Phloeotribus setulosus Eichhoff {Phloeotribus dubius Eichhoff, Phloeotribus spinipennis Eggers), Pityophthorus, pulicarius (Zim-mermann) { = Pityophthorus cubensis Schedl), Pityophthorus subsimilis Schedl { = Pityophthorus subimpressus Bright), Premnobius cavipennis Eichhoff { = Premnobius latior Eggers), Scolytus propiguus Blandford { = Scolytus penicillus Schedl), Xyleborus dryographus (Ratzeburg) { = Xyleborus linearis Schedl), Xyleborus horridus Eichhoff [ = Xyleborus flohri Schedl). Xyleborus tonsus (Hagedom), n. comb., was transferred to Xyleborus from Dryocoetes. Pityophthorus aquilus Blackman and Pityophthorus cascoensis Blackman, n. status, were removed from synonymy. Scolytodes chapuusi, n. n., is proposed for Scolytodes { = Ctenophorus) laevigatus Chapuis, 1869 (nee Ferrari 1867). The following species are named as new to science: Araptus crassus (Panama), A. obesus (Brazil), Cnesinus pro-minulus (Mexico), Conophthorus conicolens (Mexico), Microcorthylus vicinus (Mexico), Pityophthorus alnicolens (Mexico), P. assitus (Mexico), P. concinnus (Mexico), P. indigens (Colorado), P. leechi (California), P. solatus (Mex-ico), P. speciosus (Mexico), Pseudopityophthorus denticulus (Texas), Pseudothysanoes securus (Mexico), P. turnbowi (Texas), Pycnarthrum fulgidum (Colombia), Scolytodes fulmineus (Venezuela), S. radiatus (Costa Rica), Xylebo-rinus tribuloides (Mexico), Xyleborus devexus (Florida, Puerto Rico), and X. laticeps (Venezuela). On the following pages several newly dis-covered cases of synonymy and of species new to science are presented for American Scolytidae. The 21 species new to science represent the genera Cnesinus (1), Pycnarth-rum (1), Scolytodes (2), Pseudothysanoes (2), Xyleborus (2), Xyleborinus (1), Pseudopi-tyophthorus (1), Araptus (2), Microcorthylus (1), Conophthorus (1), and Pityophthorus (7), and they are from the following countries: United States (5, including one which also occurs in Puerto Rico), Mexico (10), Costa Rica (1), Panama (1), Columbia (1), Vene-zuela (2), and Brazil (1). New Synonymy Pityophthorus Eichhoff Pityophthorus Eichhoff, 1864, Berliner Ent. Zeitschr. 8:39 (Type-species: Bostrichus lichtensteini Ratze-burg, subsequent designation by Hopkins, 1914, Proc. U. S. Nat. Mus. 48:127). Pityophthoroides Blackman, 1942, Proc. U.S. Nat. Mus. 92:199 (Type-species: Pityophthoroides pudens Blackman, original designation). New synonymy In a review of the North and Central American Pityophthorus and allied genera, Blackman's Pityophthoroides pudens was placed in the genus Pityophthorus following a study of the type series. The characters on which Pityophthoroides was based inter-grade completely with those of Pityoph-thorus. Blackman's name, therefore, must be placed in synonymy. Scolytodes Ferrari Scolytodes Ferrari, 1867, Die Forst-und Baumzuchtschadlichen Borkenkafer, p. 77 (Type-species: Scolytodes laevigatus Ferrari, Monobasic) Ctenophorus Chapuis, 1869, Synopsis des Scolytides, p. 49 (Type-species: Ctenophorus laevigatus Chapuis, monobasic). New synonymy Each type series of Scolytodes laevigatus Ferrari and Ctenophorus laevigatus Chapuis consists of two males, all four of which were 'Part of this research was sponsored by the National Science Foundation. 'Life Science Museum and Department of Zoology, Brigham Young University, Prove, Utah 84602. Scolytidae contribution No. 64. 207
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