The kleptoparasitic bee "Stelis labiata" is considered very rare. Both "Stelis" and "Sapyga" larvae spin a cocoon and develop in the "Osmia" nest. Apatostelis , Dialissa , Humboldtia and Steliopsis are generally included into "Stelis". The kleptoparasitic bee "Stelis louisae" has been found in the nests. Other allied genera include&colon; "Dracula", "Masdevallia", "Restrepia" and "Stelis". Stelis coarctatus is a species of bee in the family Megachilidae.