190 DIPTEKA. 



hairs of the same colour on the vertex. This specimen would agree with Wiedemann's 

 variety ; but it would also agree with the short description of M. freycineti, $ , Macq. 

 Dipt. Exot. i. 2, p. 85 (Brazil), and indeed I have seen similar specimens thus named in 

 Dr. Loew's collection (Berlin Museum) and also in the Vienna Museum. But whether 

 the male described by Macquart (Suppl. i. p. 77) from Colombia really belongs to the 

 female M. freycineti is again a question. 



2. Mallophora pluto. 



Asilus pluto, Wiedem. Aussereur. zweifl. Ins. i. p. 477 \ 



Hab. Guatemala, El Tumbador 2500 feet (Champion). — Bkazil 1 . 



A female from Guatemala seems to belong here, and agrees with a specimen thus 

 named in the Berlin Museum. The expression that the hairs on the hind margin of 

 the second abdominal segment are lemon-yellow does not apply to my specimen ; the 

 hairs are reddish-yellow, like those on the remainder of the abdomen. The hair on the 

 ventral surface is not described by Wiedemann ; in my specimen it is black ; although. 

 I saw Wiedemann's type in Vienna I neglected to take note of this character. 



In the Guatemalan insect the veins are rather stout ; and there is a narrow streak of 

 a grey shadow in the proximal half of the submarginal cell. 



N.B. — Van der Wulp (Tijdschr. voor Ent. xxv. p. 106) is probably right in doubting 

 his identification with this species of a specimen from the Argentine Bepublic having a 

 closed first posterior cell ; this cell is open in the specimens I have seen of M. pluto ; 

 however, this character is not always constant. 



3. Mallophora ? 



Hab . Guatemala, San Geronimo (Champion). One female. 



Very like the specimens which I take for M. pluto, Wiedem., but certainly distinct. 

 The veins on the wings are much more slender, though really visible without magnifying- 

 power ; the grey shadow in the submarginal cell is much larger, reaching beyond the 

 middle of the cell; and there is a narrow vestige of a shadow in the marginal cell. 

 The abdomen is of a purer shade of yellow, the reddish appearing in the middle of 

 the back only ; the yellow hairs on the dorsal side occupy the same segments as in 

 M. pluto, that is, they begin on the hinder part of the second segment, but on the 

 ventral side the hair on the whole distal half is yellow and not black. A large yellow 

 tuft on the cheeks ; mystax black, but mixed, its upper portion especially, with some 

 yellow hairs ; a few yellow hairs on the palpi, among the black ones, and some similar 

 hairs on the vertex and occiput. The hair on the legs black. Length 18-19 millim. ; 

 wings 20 millim. 



4. Mallophora ? 



Hab. Guatemala, San Geronimo (Champion). A single male. 



