418 DIPTERA. 
dots are wanting; in the apical region of the wings there are among the larger. hyaline dots several others 
of minute size; the base and the greater part of the discal cell and of the posterior margin are hyaline, 
save some pale brown cross-lines. 
Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith). 
A single male specimen. 
5. Ensina despecta, sp.n.,?. (Tab. XII. fig. 19, wing.) 
Cinereous ; abdomen with blackish dots; head and legs rufous, the femora blackish ; wings reticulated with 
brown ; the brown border of the small cross-vein connected with that of the posterior cross-vein; a 
hyaline dot in the first posterior cell above the posterior eross-vein, 
Length 2°5 millim. 
This species is very like £. conspersa, but it has the femora blackish to near the tip, and the pattern of the 
wings somewhat different: the stigma has a white dot, and in the first posterior cell, just above the 
posterior cross-vein, there is a rounded hyaline spot (wanting in EH. conspersa), which forms the inferior 
tip of the usual hyaline costal triangle. The ovipositor is shining black, broad and flattened at its base, 
lanceolate and rufous towards the tip. 
Hab. Muxico, Xucumanatlan in Guerrero 7000 feet (Hl. H. Smith). 
A single female specimen. 
6. Ensina mediana, sp.n., ¢. (Tab. XII. fig. 20, wing.) 
Cinereous ; abdomen with black dots; head and legs rufous; wings reticulated with brown; on the costa, 
between the stigma and the end of the second vein, two hyaline incisions; in the first posterior cell, 
above the posterior cross-vein, a hyaline dot. 
Length 3 millim. 
Closely allied to the preceding (Z. despecta), but with the femora paler and the black dots on the abdomen 
more distinct. The stigma has a white dot, aud beyond it and before the end of the second vein there 
are two (not three) hyaline spots: the first is large and of irregular shape, the second smaller and rounded ; 
as in #. despecta, there is a hyaline dot in the first posterior cell just above the posterior cross-vein, but 
this dot is not connected with those above it, and therefore the hyaline costal triangle is less complete. 
Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith). 
A single male specimen. 
7. Ensina guttularis, sp.n.9. (Tab. XII. fig. 21, wing.) 
Cinereous; head and legs rufous; abdomen with black dots; wings reticulated with brown ; the brown 
border of the small cross-vein connected with that of the posterior cross-vein ; on the costa, between the 
stigma and the end of the second vein, three hyaline incisions; in the first posterior cell, above the 
posterior cross-vein, a hyaline dot. 
Length 3 millim. 
This species also does not differ much from those preceding; from E. mediuna it is distinguished by the three 
hyaline costal spots, which form, together with the similar spots under them, a rather regular triangle, 
the tip of which is a subtrigonal spot in the first posterior cell, just above the posterior cross-vein. The 
femora are not blackish. The ovipositor is flattened and shining black. 
Hab. Muxico, Chilpancingo 4600 feet, and Xucumanatlan 7000 feet, both in 
Guerrero (H. H. Smith). 
Three female specimens. 
