Studies on TipuUdae. 163 



stripe on each siele, running towards the front coxa; lateral stripes 

 of the mesonotum broad, brown, rounded in front with an interrupted 

 white line in the middle; the intermediate stripe is double; the an- 

 terior ends of its two components are hook-shaped; posteriorly these 

 stripes cross the suture and, diverging a little, reach the scutellum; 

 the brown sides of the metanotum may likewise be considered as 

 prolongations of these stripes; between them, beginning a little in 

 front of the scutellum, there is a third, intermediate, stripe, which 

 Grosses the scutellum and metanotum in the middle and, attenuating, 

 reaches the posterior margin of the latter. On the yellowish- white 

 pleura, there is a brown stripe, beginning in front of the root of the 

 wing and running towards the bind coxa ; a similar, shorter and less 

 well-defined stripe lower-down, above the middle coxae; all the coxae 

 are marked with brown spots or streaks in front and behind; a brown 

 stripe along the middle of the sternum, from the collare backwards. 

 Halteres with brown knobs. Abdomen brownish above, with a faint 

 longitudinal paler stripe on the two or three basal segments; along 

 the lateral abdominal suture a whitish stripe is formed by a series 

 of triangles, their broader end being on the anterior margin of each 

 Segment; on the second segment the white triangle is bisected by a 

 brown line. Venter whitish, with a brown streak in the middle of each 

 segment, triangulär on segments 5 — 8, and thus forming a more or 

 less interrupted longitudinal stripe. Femora brownish, except at the 

 extreme base which is paler like the coxae; tibiae and tarsi cream- 

 white. Wings sub hyaline, with a pale brownish finge; veins more or 

 less clouded with brown; costal cells infuscated; stigma brown; a 

 brown cloud along the costa, beyond the stigma. 



Hab. ' Dallas, Texas, (Boll); two males. I remember taking a 

 specimen near Washington, D. C. which apparently belonged to the 

 same species; I observed it hovering up and down in a shady place 

 in the woods, not unlike Dolichopeza. — Mr. Walker's specimen 

 was from Mexico. A female from Surinam, in the Berlin Museum, 

 is either the same, or a closely allied species. 



Tanypremna. 

 0. Sacken, Biol. Cent. Amer. Diptera, p. 19, Tab. 1, f. 2 (1886). 

 Tanypremna is very closely allied to Brachypremna ; the 

 differences are : the prothorax has no necklike Prolongation, the head 

 is closely applied to it; the seventh vein does not run into the anal 

 angle, close alongside the margin of the wing, but has the ordinary, 

 oblique position; the praefurca is shorter, more straight in its course, 

 more oblique in its position; the remaining section of the second 



11* 



