Funereal Duskywing  
Erynnis funeralis

Most of the rare sightings are serendipitous, usually in June on the Monterey or Hastings butterfly counts.  The species appears to be fairly common from San Luis Obispo Co. south, which suggests its presence in Monterey County may be limited to a few small clusters at the northern limits of its range.  

 

 Mis-identifications are also likely.  Males are very similar to male Mournful Duskywings, and may require net capture to verify ID by ventral hindwing markings (see the field guide).