1919] Dietz: Streptocera Group of Tipiila 89 



Tipula trypetophora spec. n. 



Yellowish, testaceous, shining. Antennal flagellum unicolorous. 

 Thoracic stripes distinct. Wings faintly gray, veins beyond the cord 

 broadly margined with hyaline. Pleural process conspicuous, long, 

 twisted, nearly straight. 



Male. Length, 13.5 millimeters; wings, 13.5 millimeters. 



Head testaceous. Frontal prolongation and rostrum beset with short, 

 black hairs. Palpi fuscous, the last joint scarcely as long as the preceding 

 joints together. Front and occiput fuscous with an obscure, median 

 darker line; the space surrounding the antennal insertion somewhat 

 paler. Antenna; of moderate length; scapal joints pale yellow, first 

 flagellar joint pale yellow at base, infuscate apically, the remaining 

 joints fuscous, cylindrical, basal enlargement with the usual whorl 

 of setae, the latter shorter than the respective segments; pubescense 

 whitish, very short; the last antennal joints rather strongly attenuate. 



Thorax concolorous, shining. Pronotum scarcely darker in the 

 middle. Praescutal stripes brown, well defined, the median stripe 

 very little narrowed posteriorly, the lateral stripes abbreviated in front, 

 extended upon the scutum, leaving a narrow external and internal 

 margin of the ground color. Scutel and postnotum concolorous. 

 Pleura with a pale sheen. Legs yellow, femora somewhat infuscate 

 at the apex; tibia; darker yellow; tarsi fuscous; tibiee and metatarsi 

 subequal; pilosity very dense, short, blackish. Halters sordid yellow, 

 club infuscate. Wings grayish-hyaline, costal cells with a faint, yellow- 

 ish tinge, stigma pale yellowish-fuscous. Veins brown, those beyond 

 the cord broadly margined with hyaline. Cell 1st M2 fully two and 

 one half longer than wide. The antestigmal spot more or less inter- 

 rupted, extends into cell 1st M2, Rs. and veins beyond the cord, except 

 Cui, setulose. 



Abdomen concolorous; an ill-defined dorsal stripe, more distinct 

 posteriorly; sides of tergites three to eight somewhat infuscate, three to 

 five with a dark fuscous spot near the anterior angle. Venter with ill- 

 defined, median darker stripe. The eighth stemite strongly narrowed 

 and prolonged posteriorly, the apical angles with a small, triangular 

 appendage; two narrow processes project from the middle of the posterior 

 margin, the latter without a brush of hair. Hypopygium (PI. V, 

 Figs. 9 and 10) reddish-testaceous and rather large. The ninth tergite 

 short, with narrow median incision, the apex of each side curv^ed dorsad 

 in the form of a small, obtuse tubercle, which is concave and shining 

 on its posterior face. Ninth stemite short, broadly emarginate; pleural 

 suture complete. Pleural process conspicuous, twisted at the base 

 and within the latter arises a sharp, conical process; the direction of the 

 process is nearly straight, caudad; apical appendages inconspicuous. 



Female. Length 12.5 millimeters; wing, 13.5 millimeters. Flagellar 

 joints two and three yellowish towards the apex, remainder of flagellum 

 light brown. The lateral abdominal stripe distinct from tergite three to 

 eight. Ovipositor short, concolorous, viewed laterally upper valves 

 almost circular, lower valves elliptic, the upper margin ending in a 

 very fine, spine-like prolongation. 



