A NEW TRYPETID FROM CHACALTIANGUIS, MEXICO, 
WITH A NOTE ON HEXACHATA AMABILIS LW. 
BY C. H. TYLER TOWNSEND. 
The following trypetid was collected by the writer, December 
31, 1892, at Chacaltianguis, a river town about seventy-two 
Mexican miles up the Papaloapam River from Tlacotalpam. It 
was taken with other diptera and various insects, by sweeping 
the undergrowth in the edge of the woods back of the town. 
This trypetid belongs, by the markings of its wings, in the 
genus Euaresta. It has four bristles on the scutellum, which 
does not, however, preclude it from this genus, as some of the 
species placed here by Loew also possess four scutellar bristles. 
But the shape of the wings is distinctly different from that of 
the wings of Euaresta. They are very broad on the median 
one-half of their length, then slightly taper to a blunt apex. 
I shall leave the form for the present, however, in Euaresta. 
The species is very similar to £. Mexzcana Wd. and £. melano- 
gastra Lw. (syn. of preceding ?) but differs from both in having 
four bristles on the scutellum; and it also differs from all the 
species of Euaresta in another character which must be men- 
tioned, and which was considered by Loew of generic importance, 
that of the third longitudinal vein being bristly almost to its 
termination. 
EUARESTA LATIPENNIS nov. Sp. ?. 
Front more than one-third width of head posteriorly, evenly 
narrowed to about one-third width of head at base of antennze, 
pale silvery on borders, the rest being taken up with the wide, 
very dilute tawny frontal vitta, which also has a silvery reflection. 
Antennz very dilute tawny, third joint about one and one-half 
times as long as second, second joint with a small bristle 
anteriorly and sparsely clothed with minute bristles; arista 
thickened basally, where it is concolorous with antenne, and 
shows a basal joint, blackish on remaining portion. Eyes (in 
dry specimen) dark green, or dull purple, according to change of 
light. Frontal bristles five in number on each side, not including 
the long posteriorly directed pair on vertex; of these the anterior 
