| Sammanfattning: | A study of the species richness, abundance and phenology of the Scarabaeoidea beetle fauna of the mountains of Puebla, México is presented. Monthly data were obtained during May 1999 to June 2000 in pine-oak-sweet gum forests and crop lands, located at 1,990-2,000 m of altitude. Records of 59 species, 29 genera, 18 tribes and 7 subfamilies of Melolonthidae, Scarabaeidae and Passalidae, represented by 2,082 specimens, are included. Phyllophaga godmani (Bates), Isonychus piperitus Bates, Anomala terroni Morón, Chrysina peruviana Kirby, Plusiotis aurofoveata Morón, Cyclocephala fasciolata Bates, Dynastes hyllus Chevrolat, Deltochilum mexicanum Bates, Ontherus mexicanus Harold, Onthophagus cyanellus Bates, Passalus punctatostriatus Percheron, Proculejus hirtus (Truqui) and Odontotaenius zodiacus Truqui, were the most interesant species collected. High and representativespecies richness was found instead of the disturbs in the forests. Phyllophaga vetula (Horn), P. xanthe (Bates), Macrodactylus mexicanus Burmeister, Hoplia squamifera Burmeister, Cyclocephala jalapensis Casey, C. weidneri Endrodi, and Chrysina macropus Francillon, were the most abundant species in the samples. Adults of many species are active during April to June. Scarab beetle fauna of Teziutlán area is 80% similar (Simpson) with the species found in the mountains at northeast of Hidalgo, Mexico; 33% similar with the species from the neighboring area of Cuetzalan, Puebla, and 17% similar with Los Tuxtlas, Veracruz. A key to the 59 species is included.
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