1912] Ncnv Neotropical Til?itlince 3G1 



has the terminal section of R; more or less preserved. f I 

 prefer to believe that the species represents a new genus to 

 which I have applied the above name from the small size of the 

 included form. 



Microtipula amazonica, sp. n. 

 Bluish grey; cf antenna; elongated, 9 short; wings hyaline ^vith 

 brown markings. 



cf Length, G.2 mm.; wing, 7.2 mm.; antennae, about 5.5 mm. 



Fore leg, femur, 4.-1 mm.; tibia, 5.9 mm.; tar.sus, 9.4 mm. 



Middle leg, femur, 4.5 mm.; tibia, 5.3 mm. 



9 Length, about 6.8 mm.; wing, 7.4 mm. 



Fore leg, femur, 4.9 mm.; tibia, 6 mm. 



Middle leg, femur, 5.2 mm.; tibia, 5.3 mm.; tarsus, about 9.4 mm. 



Hind leg, fenuu-, 4.9 nmi.; tibia, 5.4 mm.; tarsus, about 10 mm. 

 cfHead: Anterior prolongation of the front short, dark bro\vn; 

 jjaljii, lighter, yellowish-bro\\m. Antennas, segments 1 — 2, yellowish- 

 brown ; segment 3- brown ; remaining segments dark brownish-black, the 

 segments elongated, not enlarged basally, covered with a long pale 

 pubescence; a few long dark basal bristles. Front brown; vertex and 

 occiput clear bluish-grey. 



Thorax: Cervical sclerites bluish-grey; pronotum clear light grey, 

 unmarked. Mesonotum, praescutum greyish with a thick blue-grey 

 bloom, especially thick on the .sides and in front, leaving a ctuiciform 

 median mark, grey; scutum and scutcUum grey; postnotmn with a 

 decided blue-grey bloom. Pleura; bluish-grey. Halteres bro^m, the knob 

 dark bro\\ai. Legs: coxae yellow, greyish ]jruinose on the front; tro- 

 chanters dull yellow; femora yellow, the tip Ijroadly dark browai; tibiae 

 ycIlo\\'ish brown, the tip darker; tarsi brown. Wings: Subhyalinc; cells 

 C and Sc dark browm; stigma oval, brown, filling in the tip of cell 

 1st Ri and the extreme base of cell 2d Ri. Tip of cell 2d Ri, most of 

 cell R3, cephalic portion of R; median portion of M, and seams along 

 most of the veins paler browTi. Venation (see Fig. i) as in the genus. 

 Abdomen: Tergum, segments 1 — 2 yellow, dark brown apically 

 and on the sides of the sclerites; 5th dark browTi, except the basal 

 third; Gth mostly yellow, darker, almost black, on the apical half and 

 along the lateral margin of the sclerite; 7th black; base of 8th suffused, 

 black. Hypopygium (see Fig. q) : Sth stemite rather long, at least twice 

 as long as the 7th and even higher; 8th tergite short, about two-thirds 

 as long as the 7th and not as deep. 9th stemite, viewed from the side, 

 rather short, the ventral margin about straight, the caudal end gently 

 roimded, with an appendage (e) ; dorsal side with a roimdcd, chitinized 

 black knob; appendage of the stemite broad, bi-lobed, the ventral lobe 

 with. a long flexible, finger-like tip projecting caudad and dorsad; the 

 upper, or cephalic, lobe lying closely appressed to its dorsal margin, 

 elongate-cylindrical, rather fleshy. 9th tergite (in the drawing. Fig. q, 9, 



XPehlkea End. show a species in which Rj seems to be present; the venation, 

 apparently, is misinterpreted in the figure. (Zool. Jahrb.; Vol. 32, pt. 1, p. 15.) 



