The New World species of Cerodontha (Xenophytomyza) Frey (Diptera: Agromyzidae) Author Boucher, Stéphanie text Zootaxa 2003 178 1 8 journal article 10.5281/zenodo.157066 bddce942-feff-4dfb-be09-c1e682bcc4e9 1175­5326 157066 Key to the New World species of Cerodontha (Xenophytomyza) 1. Presutural dorsocentral bristle 0.33–0.55 times the length of posterior postsutural dorsocentral. Wing slightly infuscated at junction of C and R1 ( Fig. 3 ). Phallus in lateral view with distal section curved dorsally; apex with hyaline cup­shaped dilation ( Fig. 1 )..................... C. (X.) biseta ­ Presutural dorsocentral bristle shorter, 0.23–0.35 times the length of posterior postsutural dorsocentral, sometimes undifferentiated from surrounding setulae or absent. Wing clear at junction of C and R1. Phallus in lateral view with distal section slightly bent ventrally (Figs. 4–5); apex without membranous dilation .................................................................. C. (X.) illinoensis