1912] New Neotrol)ical Tipnliiuc 349 



Allotype. 9 , with the type. 



Types in Am. Mus. of Nat. Hist., New York. 



I know of no species of Tipula that even approaches this 

 remarkable fly. No form in the American fauna has a spnr 

 on the wing. 



Tipula guato, sp. n. 



Color light yellow; flagcUum of antennae bi-colored; wing subhyaline. 

 cf Length, about 12 mm.; wing, 11.5 mm. 

 Fore leg, femur, 7.6 mm. ; tibia, 9 mm. 



Head: Anterior prolongation of the front rather short; nasus not 

 distinct, but with a long brush of hairs in its normal position; dull 

 vellow, brightest on the sides. Palpi, light yellow, short. Antenna;, 

 basal segments vcUow, second segment with a brush of hairs on the 

 inner face; flagclkun, segments swollen on the ends, narrowed medially; 

 the basal knot blackish, and with a few prominent hairs; the entire 

 segment clothed with dense pale hairs; basal segments of flagellum with 

 apices yellow, this color gradually passing into the dark brown of the 

 terminal segments. Front, vertex and occiput dull brownish-yellow. 



Thorax: Mesonotum, pra;scuttmi dull yellow without apparent 

 stripes; scutum, scutellum and post-notum similar but more or less 

 suffused with brown. Pleiu-as dull yellow, sparsely greyish pollinose. 

 Halteres, stem yellow, knob bro^vn. Legs: coxee and trochanters 

 light yellow gradually passing into the bro\vn of the tarsi (only fore legs 

 remain). Wings: Subhyaline; stigma oval, pale brown; cell C and 

 apices of cells Ro and R3 tinged with yellow; veins brown, Sc more 

 yellowish. Venation: (see Fig. e); Sc long ending far beyond Rs; Rs 

 short, about as long as Mi+j between cross-veins r-m and m; R2+3 in a 

 line with R3; R2 oblique; cell 1st M2 rather elongated; petiole of cell 

 Ml short; cross-vein m-cu distinct. 



Abdomen: Tergum light brown, almost uniform; 7th and Sth 

 black; hypopygium yellow; stemites light brown; 7th and base of Sth 

 black. Hypopygimn': (see Fig. p) ; 7th stcmite broad, its caudal margin 

 almost straight; 7th tergite almost convex; Sth stemite (Ss) broad at 

 the base with a very obtuse tooth on its dorsal margin; produced 

 behind into a bltmt point which is broadly and obtusely notched at the 

 tip; Sth tergite (St.) moderately broad, about one-third as wide as the 

 7th, rather widened at the ends, but the caudal margin almost straight ; 

 9th stemite (9s) subquadrate, large, its dorsal margin straight; its 

 caudal margin trimcated; ventral margin with an obtuse ventral- 

 projecting tooth; the inner margin is bent inw-ard and has a dorsally- 

 directed tooth; tliis inw^ard projection of the 9th stemite fills a consid- 

 erable portion of the genital chamber between the 9th stemites and just 

 dorsad of the Sth stcmite. Along the median line it is deeply notched, 

 and the wiiole external face is densely covered with delicate, silvery- 

 white, appressed hairs. 9th tergite (9t.) rather short with an obtuse 

 median notch, the adjacent teeth broad, obtuse, projecting dowmward, 

 denselv covered with short, stout hairs, the extreme base of each tooth, 



