OTPHOMYIA. 35 



C. androgyna, $ , is very like C. varipes, $ , brought from the same locality ; but is 

 easily distinguished by the colour of the femora, which, in the latter, are yellowish- 

 white on the proximal half; the face of C. varipes has a silvery pubescence, instead of 

 a golden one ; the spines of the scutellum have a more horizontal direction ; the front 

 is grooved in the middle in C. varipes, but not so in C. androgyna. 



When I compare C. androgyna, $ , with the description of C. verticalis, 2 , I find 

 that the former has golden, and not silvery hairs on the face ; the front is not per- 

 ceptibly coarctate anteriorly, and is not grooved : the ocellar tubercle is on a line 

 between the upper corners of the eyes ; I do not perceive any longitudinal folds 

 enclosing it, as described by Gerstaecker, although the interval between the two 

 grooves, upon which the ocellar tubercle is placed, is slightly convex : the violet 

 reflections of the body are very distinct ; I do not see any cross-band of whitish hairs on 

 the back part of the thorax, nor whitish hairs on the abdomen ; the points of the 

 scutel are not turned inwards, and are at least as long as the scutel ; the second joint of 

 the front tarsi is altogether dark brown, chat of the middle tarsi, in some specimens, 

 is a little paler at base. 



N.B. — The androgynous character of the head of the male of this species puts me 

 in mind of another Cyphomyia, in which the female assumes a character ordinarily 

 belonging to the male only ; it is the C. scalaris, Bigot, Ann. Soc. Ent. Fr. 1875, p. 487 

 (Mexico) ; both male and female are said to have contiguous eyes. 



3. Cyphomyia albitarsis. 



Cyphomyia albitarsis (Fabr. ?), Bellardi, Saggio &c. i. p. 22 \ 



Hab. Mexico, Merida, in Yucatan 1 ; Costa Rica, Cache (Sogers) ; Panama, Taboga 

 Island (Champion). — 1 Venezuela 1 ; % Guiana 1 . 



I have five specimens from Costa Eica and the State of Panama that agree with 

 Prof. Bellardi's description, except that the two spines of the scutellum are altogether, 

 not their points only, pale yellow. In the description of the wings — " alis fuscis, 

 macula centrali longa, transversa hyalina" — I think that " longitudinali " would have 

 been more appropriate than " transversa." I do not quote Cyphomyia albitarsis, (Fabr.) 

 Gerstaecker, Linn. Ent. xi. p. 300 (syn. C. fenestrata, Macq. Dipt. Exot. Suppl. i. 

 p. 48), because both Gerstaecker and Macquart describe the abdomen as blue, while my 

 specimens, in agreement with Bellardi's description, have it black. 



Is it a different species % Gerstaecker's two type-specimens in Berlin have a bluish 

 abdomen and seem smaller ; unfortunately 1 had none of my specimens at hand for 

 comparison. The types in Prof. Bellardi's collection agree with mine. 



4. Cyphomyia ?, «?. 



Eyes with a distinct, erect, fulvous pubescence, occupying the greater part of the head ; occipital orbits not 

 developed. Head and thorax much more bulky than those of C. androgyna, male, the head looking much 



/2 



