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HYMENOPTERA: First record of a trasorine hymenopteran (Figitidae) for the Costa Rican Fauna and, description of a new species
J. Pujade-Villar, A. Bourg y P. Hanson ………………………………………………………..................................... 137-141

   
 

HEMIPTERA: New finding of Eratyrus cuspidatus Stål (Hemiptera: Reduviidae) in Yucatan
      E. Reyes-Novelo & H.A. Ruiz-Piña ………………………………………………………..…. ................................143-145

   
 

COLEOPTERA: A review of the distribution of Harposcelis paradoxus Burmeister, 1847 (Coleoptera: Scarabaeidae: Dynastinae: Cyclocephalini) with a new country record for Peru
J.-P. Saltin & B.C. Ratcliffe ……………………………………………………………………............................................ 147-151

   
 

COLEOPTERA: First record of Gymnetina alboscripta (Janson, 1878) (Coleoptera: Scarabaeidae: Cetoniinae) from Guanajuato, México
J.L. Ortega-De Santiago ………………………………………………………………………............................................ 153-154

   
 

CONTRIBUTIONS IN HONOR TO DOCTOR GONZALO HALFFTER
Doctor Gonzalo Halffter
S. Guerrero-Vázquez ………………………………………………………………………….............................................. 155-156

   
 

The influence of Dr. Gonzalo Halffter in training scientists for the study of biodiversity: a personal point of view
C.E. Moreno …………………………………………………………………………………….................................................. 157-160

   
 

COLEOPTERA: Phyllophaga (Listrochelus) gonzalffteri, a new species from Oaxaca and Puebla, México (Coleoptera: Melolonthidae: Melolonthinae)
M.A. Morón …………………………………………………………………………………….................................................... 161-168

   
 

PSOCOPTERA: Two new species of Triplocania from Veracruz, Mexico (Psocodea: ‘Psocoptera’: Ptiloneuridae)
A.N. García Aldrete ……………………………………………………………………………............................................... 169-173

   
 

BOOK REVIEW: Ichneumonidae (Hymenoptera) del estado de Tamaulipas, México
J.M. Coronado-Blanco………………………………………………………………………………........................................... 174

   
 

COLEOPTERA: Cratomorphus halffteri, a new species  of Mexico (Coleoptera: Lampyridae: Cratomorphini)
S. Zaragoza-Caballero …………………………………………………………………………............................................ 175-179

   
 

BOOK REVIEW: Manual de plagas y enemigos naturales en cedro rojo de Tamaulipas, norte de Veracruz y de San Luis Potosí
S.N. Myartseva …………………………………………………………………………………….............................................. 180

   
 

COLEOPTERA: Reproductive cycle of Blackburneus saylorea (Robinson, 1940) (Coleoptera, Aphodiinae), coprophagous beetle from Western slope of volcano Cofre de Perote, Veracruz, Mexico
I. Martínez M. & T. Suárez L. ..………………………………………………………………........................................... 181-187

   
 

HYMENOPTERA: Eretmocerus Haldeman species (Hymenoptera: Aphelinidae) parasitoides of whiteflies of the genus Tetraleurodes Cockerell (Hymenoptera: Aleyrodidae) in México, with description of three new species
      S.N. Myartseva, E. Ruíz-Cancino & J.M. Coronado-Blanco ……………….………………....................... 189-195

   
 

COLEOPTERA: Forty years of genital anatomy in scarab beetles (Coleoptera: Scarabaeoidea) taxonomy: the state of the art
      M. Zunino ……………………………………………………………………………………... ............................................197-206

   
 

COLEOPTERA: Scarabaeidae and Hybosoridae (Coleoptera: Scarabaeoidea) from Rancho El Salado, Jolalpan, Puebla, México
      B. Sánchez-Velázquez, H. Carrillo-Ruíz, M.A. Morón & S.P. Rivas-Arancibia ……………................ 207-215

   
 

COLEOPTERA: Synopsis of the Xanthopygina genera (Coleoptera: Staphylinidae: Staphylinini) from Colombia
      D. Torres Rodríguez, G.D. Amat y J.L. Navarrete-Heredia ………………………………...….................... 217-241

   
 

COLEOPTERA: Observations of the sexual dimorphism in Diceroderes mexicanus Solier, 1841 (Coleoptera: Tenebrionidae: Tenebrioninae) and, new records from Oaxaca, Puebla and, Veracruz
      P. Cifuentes Ruíz & S. Zaragoza-Caballero ………………………………………………….............................. 243-245

   
 

NUEVOS TAXONES PUBLICADOS EN DUGESIANA VOLUMEN 18 …………………………..................... 246

   
 

NORMAS EDITORIALES ……………………………………………………………………………........................................ 247

   
  Dugesiana 18 (2) Completa