New genus, new species and new records of Mexican Lygaeoidea (Hemiptera: Heteroptera)

Andercnemodus picachus is described and illustrated as a new genus and species of Myodochini (Lygaeoidea) from Baja California (Mexico). The following Lygaeoidea are recorded from Mexico for the first time: Ochrimnus foederatus (Van Duzee) (Lygaeidae), Thylochromus nitidulus Barber (Drymini), Sphragisticus nebulosus (Fallen) (Megalonotini) and Pseudopamera rubricata (Barber) (Myodochini). New Mexican records of Heterogaster behrensii Uhler (Heterogastridae) are added.