32 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



Hermetia species 



Figures 68, 70, 76 



Description. — Mature larva: length 17.5 mm; width 5.5 mm; 

 head and body segments orange yellow, head more darkly pigmented 

 at distal end; eyespots not distinct; transverse row of small spines 

 present on segments 1-7 near anterior margin. 



Biology.— Same as noted for H. concinna. 



Material examined. — Three larvae with same data as for H. 

 concinna. 



Discussion. — There may be some doubt as to the validity of 

 this species because the specimens used to describe it were found 

 with those of H. concinna. 



Hermetia aurata Bellardi, 1859 



Figures 67, 71, 73 



Description. — Puparium: length 17.8-22.3 mm, mean 20.05 mm; 

 width 5.1-6.0 mm, mean 5.55 mm. Other characters as given in 

 key to species. 



Biology. — Larvae have been collected from prickly pear (Opuntia 

 occidentalis) . 



Material examined. — California: San Dimas Canyon, Pomona, 

 Los Angeles County, Dec. 4, 1960, A.D.M. 72, Ryckman and Olsen, 

 two puparia, WSU. 



Genus Dieuryneura James, 1937 

 Dteuryneura obscura (Coquillett), 1902 



Figures 16, 24, 27, 32 



Description. — Matm-e larva: length 14.9 mm; width 4.0-4.3 mm, 

 mean 4.1 mm; head and body segments dark brown. 



Biology. — Larvae of this species were collected from a decaying 

 sotol plant stem {Dasylirion species) . 



Material examined. — Texas: 12 miles north of Presidio, Apr. 18, 

 1952, 52-6319-Presidio-3119-L, 1 larva, 11 puparia, USNM. 



Subfamily Stratiomyinae 



This subfamily is composed of the species of Stratiomyidae, whose 

 larvae are aquatic or semiaquatic. The larvae vary in size from a 

 few millimeters to 50 millimeters. One commonly finds larvae of 

 this subfamily as representatives of this family in general collections 

 of immature stages. This can be explained best by the fact that the 

 aquatic species are more numerous and, therefore, easier to locate 

 than the terrestrial species. 



