52 MISC. PUBLICATION 6 31, U. S. DEPT. OF AGRICULTURE 



However, they frequently attack old and festered sores in man and 

 animals, or invade diseased body openings. According to Patton this 

 is a notorious myiasis-producing species in British Guiana. In Texas 

 it has been reported as infesting rabbits and other animals and causing 

 serious damage to tissues. Roberts (121) has reported finding 583 

 larvae in an old gunshot wound in a rabbit, in association with a few 

 Callitroga, and he says that the infestation was such that it would 

 have proved fatal had they not been removed. 



SARCOPHAGA LAMBENS Wiedemann 



Synonyms. — Sarcophaga sternodontis (Townsend) ; Sarcophaga pyophila 

 Neiva and Gomes; Sarcodexia sternodontis Townsend. 



Recognition Characters. — Adult : The parafacials are about half as wide as 

 the clypeus ; the palpi are black ; there are two or three frontal bristles below the 

 anterior angles of the frontalia, and three or four rows of setulae behind the 

 eyes on the upper half of the occiput. Anterior acrosticals are absent, or at most 

 there is a pair just before the suture ; there are four pairs of postsutural dorso- 

 centrals, the first two of these weak ; the scutellum has a pair of cruciate apical 

 bristles in addition to the lateral ones. The epaulet is black, vein ri without 

 setulae, and the hind tibia of the male without long villous hairs. The hypo- 

 pygium is small, the first segment being blackish and the second red ; the forceps 

 are yellow for their entire length, very wide, and of a very characteristic form, 

 the apex being strongly bent forward and truncated. 



Geographical Distribution. — Nearctic Region : South Carolina, Georgia, Flor- 

 ida, Mississippi, Missouri, Louisiana. Neotropical Region : Mexico, British 

 Honduras, Honduras, El Salvador, Panama, Canal Zone, Cuba, Jamaica, Haiti, 

 Dominican Republic, Puerto Rico, St. Vincent, Tobago, Grenada, Trinidad, 

 Gorgona Island, Colombia, Ecuador, Venezuela, British Guiana, Brazil, Peru, 

 Boliva, Paraguay, Argentina. 



Pathogenesis. — The larvae breed in various substances, including 

 carrion and excrement ; they have been found to be parasitic on a 

 large number of insects. Cases of wound and cutaneous myiasis 

 appear to be fairly common. Neiva and Gomes de Faria (93) report 

 a case in which larvae had attacked a suppurating contusion in the 

 right parietal region of a 10-year-old girl, the suppuration being 

 favored by the long hair. A case of auricular myiasis in a 11-month- 

 old child in the Canal Zone has been reported. This species is said to 

 attack wounds and ulcers in man in South America, and has been 

 reported from wounds of cattle in Florida. 



SARCOPHAGA CHRYSOSTOMA Wiedemann 



Synonym. — Clirysostomomyia chrysostoma (Wiedemann) of Townsend's 

 Manual. 



Geographical Distribution. — Confined to the Neotropical Region: Mexico, 

 Baja California, Honduras, Nicaragua, Costa Rica, Panama, Canal Zone, Virgin 

 Islands, Jamaica, Tobago, Trinidad, Gorgona Island, Colombia, Ecuador, Vene- 

 zuela, British Guiana, Brazil, Peru, Chile. Also recorded from Argentina, but 

 the record is questionable. Very common in parts of its range (e. g., Tampico, 

 Mexico, British Guiana, and the coast of Brazil). 



Pathogenesis. — Said by Patton to be a notorious myiasis producer 

 in British Guiana. 



SARCOPHAGA MISERA Walker 



and Belated Forms 



Status of Species. — In this group, which, according to Senior- 

 White, Aubertin, and Smart (139), occurs in all parts of the world 



