Se P t.,i9o 5 .] Dvar : HESPERiiDiE of the United States. 141 



Subfamily Mk<; athymix.k. 



Genus MEGATHYMUS Scudder. 



S\ nopsis of Species. 



1. Hind wings with the outer margin yellow 2. 



Hind wings with the outer margin black a 



2. A white angled patch on subcostal vein below; male without erect hairs. ..VUCCSB. 

 No such white patch below ; male with long erect hairs on the hind wings 3. 



3. Males with the hairs long ; females with the dislocated spots of veins 4-6 large 



streckeri. 

 Males with the hairs shorter; females with these spots small crfaqui. 



4. With yellow spots on the hind wings above 5. 



Without such spots ., ursus. 



5. Fore wings with submarginal fulvous band neumoegeni. 



Fore wings with the band cut into spots by black veins aryxra. 



M. yucca? Boisduval & Leconte 



Southern Atlantic states, the larva in the roots of Yucca. Mabille 

 thinks that coloradensis Riley is a distinct species, but I am unable to 

 separate it except by the size. 

 M. cofaqui Strecker. 



From Texas. 

 M. streckeri Skinner. 



Texas, Colorado. Not well separated from the preceding. 

 M. neumoegeni Edwards. 



From Arizona. Types are in the Neumoegen and Strecker collec- 

 tions and have extensive confluent fulvous markings. The figure in 

 the Biologia represents a differing form which has been generally 

 erroneously identified as neumoegeni. 

 M. aryxna, new species. 



This is the form figured in the Biologia Cent. -Am. Lep. Het., Ill, 

 pi. 69, figs. 3 and 4. It differs from neumoegeni in having the fulvous 

 markings considerably reduced, the outer band being broken into 

 spots. I have ten specimens from Arizona from Dr. Barnes and Mr. 

 Poling. 

 M. ursus Poling. 



Arizona. Known only in the female. 



