396 On Cutiterebra and its Allies. 



In addition to the specimen mentioned above, the Museum 

 also possesses two larvas of Dermatobia, both of which are 

 probably in the second stage, and belong to the form known 

 in Cayenne as the " Yer macaque," although one is con- 

 siderably smaller and more attenuated than the other. 

 D. cyaniventris is the only species at present described ; but 

 whether either or both of these larvae belong to this species or 

 to some other it is, of course, impossible to say. The smaller 

 larva, which was removed from the arm of Mr. E. Bartlett 

 in Chamicuros, E. Peru, in 1867, is 15 millim. in length, of 

 which the more swollen portion, consisting of the first seven 

 segments bearing the usual bands of spines, occupies less 

 than one third. The width of this larva at the sixth segment 

 (the widest part of the swollen portion) is 2^ millim., while 

 the width in the centre of the attenuated portion is only 

 1 millim. The second larva is from Trinidad, and was 

 foi-warded by Mr. J. H. Hart at the same time as the 

 typical specimen of Cutiterebra funehris, Austen. This 

 lai-va was removed from a human knee at the commencement 

 of December 1894. In his letter accompanying it Mr. Hart 

 writes : — " From frequent cases I think it highly probable 

 that we have several species of this kind of insect in the 

 colony." This, however, remains to be seen ; there may be 

 several species of Dermatobia in Trinidad, but it is quite 

 ])0ssible that Mr. Hart is referring to diiFerent stages of the 

 larva of the same insect. The dimensions of this larva are as 

 follows : — Length 9^ millim. ; length of swollen portion 

 7 millim. ; greatest width about 4 millim. ; width of attenu- 

 ated portion 1^ millim. Although about twice the length, in 

 the ratio of the attenuated to the swollen portion of the body, 

 this larva closely resembles that described and figured by 

 Dr. Matas ('Insect Life,' i. pp. 76-80^ fig. 10), which, with 

 two others, was removed by the author referred to, in the 

 Charity Hospital, New Orleans, from the body of an English- 

 man who had recently come from Spanish Honduras. 



EXPLAXATIOX OF PLATE XIH. 

 Fly. 1. Cutiterebra funehris. 

 Fig. 1 a. Ditto. Head from in front. 

 Fig. 1 i. Ditto. Pupa-case. 

 Fig. '2. Cutiterebra terrisona, Walk. 

 Fig. 2 a. Ditto. Head from in front. 

 Fig. •>. Cutiterebra rujiventris, Macq., $ . 

 Fig. 3 a. Ditto. Head from in front. 

 Fig. 4. Cutiterebra nigrieincta. 

 Fig. 4 a. Ditto. Head from in front. 

 Fig. 5. JJogeria princeps. 

 Fig. o a. Ditto. Head from in front. 

 Fig. 5 6. Ditto. Pupa-case. 



