36 INSECUTOR INSCITl/E MENSTRUUS 



Wings small, narrow, with typical venation. 



Legs dark violet-blue scaled, the femora silvery yellowish-white scaled 

 beneath nearly to apices ; tibiae and tarsi unmarked. Claws simple. 



Trinidad, West Indies (F. W. Urich). 



Type: Cat. No. 15603, U. S. Nat. Mus. 



Described from a single female reared by Professor Urich from a larva 

 found in water held by an epiphytic bromeliad. The body of the larva 

 showed iridescent colors. 



Evidently closely related to Megarhinus violaceus Wiedemann, de- 

 scribed from the State of Bahia, Brazil, but does not agree with the 

 description of that species in several details. In that species the lateral tufts 

 of the sixth segment are said to be golden and there is no mention of the 

 abdominal lateral silvery spots, so conspicuous in the specimen before me. 



It must be pointed out that Megarhinus maris, is in all probability a 

 synonym of M. violaceus Wiedemann. The former is known only from 

 the female, the latter only from the male. Both are from the same locality, 

 Bahia, and agree in general coloration, as well as in the presence of bi- 

 colored caudal tufts and the absence of tarsal markings. My information 

 in the case of violaceus rests upon an examination of the type by Dr. 

 L. O. Howard. The species called Ankylorhynchus violaceus by 

 Lutz, Theobald and Peryassu is not identical with Wiedemann's species, 

 nor is the Megarhinus purpureus of Theobald which has been placed 

 as a synonym of it. This last, however, agrees with the violaceus of 

 Lutz, and that species will therefore have to be known as Ankylorh^n- 

 chus purpureus. The synonymy therefore stands as follows : 



Megarhinus violaceus (Wiedemann). 



Culex violaceus Wiedemann, Aussereurop. zweiflueg!. Ins., i, 3, 1828. 

 Megarhina (?) violacea Giles, Handb. Gnats or Mosq., 132, 1900. 

 Megarhina (?) violacea Giles, Handb. Gnats or Mosq., 2 edit., 278, 1902. 

 Megarhinus maria Bourroul, Mosq. do Brasil, 3, 1904. 

 Megarhinus maria Theobald, Men. Culic, iv, 129, 1907. 



Ankylorhynchus purpureus (Theobald). 



Megarhinus purpureus Theobald, Mon. Culic, i, 230, 1901. 



Megarhinus violaceus Theobald (not Wiedemann), Mon. Culic, iii, 117,1 903. 



Ankylorhynchus violaceus Lutz (not Wiedemann) in Bourroul, Mosq. do Brasil, 



65, 1904. 

 Ankylorhynchus wo/aceus Theobald (not Wiedemann), Mon. Culic, iv, 127, 1907. 

 Ankylorhynchus violaceus Peryassu (not Wiedemann), Culic. do Brasil, 1 49, 1 908. 



Date of publication, March 29, 1913. 



