308 DIPTERA. 
Hab. Norra America! ?.—Mexico, Northern Sonora (Morrison), Patacuaro (F. D.G.), 
Amula in Guerrero, Cuernavaca in Morelos, and Vera Cruz (H. H. Smith). 
Several specimens of both sexes. The Mexican specimens agree perfectly with the 
ample descriptions given by Loew, to which I may refer for further details. It is 
possible that 7. pictipes is identical with the European Tetanocera umbrarum, L. (see 
Loew, loc. cit.). 
3. Tetanocera acuticornis, sp. n.,3. (Tab. IX. fig. 18, head in profile.) 
Brownish-cinereous ; antenne rufous, third joint pointed; face white; femora spotted; wings with a very 
close reticulation, showing transparent dots. 
Length 4~5°5 millim. 
Allied to the preceding (T. pictipes), but generally smaller in size. Front yellowish-cinereous, opaque, with a 
brown longitudinal median stripe; the frontal bristles arising from black dots, which, however, are much 
smaller than in J. pictipes; a small brownish spot on each side between the orbits and the root of the 
antenne. Face white, without the black central point (which in all the specimens of 7. pictipes is 
present); on each side of the cheeks, beneath the eyes, a brown streak. Antenne rufous; second joint 
bristly ; third joint as long as the second, excised on the upperside and ending in a sharp point; arista 
black, with a scanty, rather long pilosity. Proboscis brown; palpi pale rufous. Thorax, scutellum, and 
abdomen brownish-cinereous, covered with small blackish dots; scutellum with four bristles; abdominal 
segments with more or less conspicuous blackish spots, the middle ones of which form a dorsal stripe. 
Legs dark rufous; femora with two black spots near the tip; tibie with black tips; tarsi brown, the 
two or three terminal joints black, the basal joint of the front pair pale. Halteres yellowish. Wings 
brownish, more obscure along the costa, grey towards the hind border, and with numerous transparent 
dots, which are more regularly placed along the veins; small cross-vein a little beyond the end of the first 
vein and on the middle of the discal cell; posterior cross-vein slightly convex. 
Hab. Mexico, Northern Sonora (Morrison). 
Several male specimens. 
4. Tetanocera spreta, sp.n.,¢ °. 
Brownish-testaceous ; front, antenne, and legs rufous; arista scantily plumose; wings cinereous, a blackish 
cloud at the end of the second vein; cross-veins infuscated ; posterior cross-vein distinctly biarcuated. 
Length 6°5—7°5 millim. 
Front orange-rufous, opaque, with a brown, somewhat shining, median stripe; a brown dot on each side 
between the eyes and the root of the antenne ; face and cheeks pale yellow, the cheeks with short hairs ; 
on the occiput a black median spot, laterally bordered with white. Antenne rufous; second joint with 
black hairs on the upper and under sides; third joint coniform, as long as the second ; arista black, with 
a scanty but long plumosity. Proboscis rufous; palpi yellow. Thoracic dorsum brownish-testaceous, 
with four brown stripes; pleure greyish-yellow; a brown stripe from the shoulders to beneath the base 
of the wings; scutellum rufous, with four bristles. Abdomen brown, with the incisions clearer. Legs 
rufous, front tibie and hind femora usually with black tips; tarsi brown, the terminal joints black. 
Halteres yellow. Wings brownish-cinereous; a blackish cloud at the end of the second vein; cross-veins 
bordered with brown; small cross-vein beyond the end of the first vein and on the middle of the discal 
cell; posterior cross-vein very oblique and arcuated in the form of an S. 
Hab. Mexico, Jalisco (Schumann), Mexico city (H. H. Smith). 
Three male and two female specimens. In the S-like arcuation of the posterior 
cross-vein this species agrees with the European representatives of the genus Elgiva, 
Meig., but it differs from them in the plumose arista. 
