362 Annals Entomological Society of America [Vol. V, 



the 9th tergite is seen from a dorsal aspect) viewed from above, rectan- 

 gular with a very deep oval notch, the lateral lobes squarely truncated 

 at the tips, clothed with long hairs, these longest at the apex; a few hairs 

 on the ventral face. Penis (p.) extremely long and slender projecting 

 far beyond the genital chamber and is almost half as long as the whole 

 abdomen. 



9 Like the cf, but antennae short; segments 1 — 5 light j^ellow, 

 these gradually darkened; pleurae lighter grey; dark femoral tips not so 

 broad. Abdomen, tergum, segments 1 — 2, yellow, tip and margin 

 darker; segment 3 almost all black except the base; segments 4 — 5, 

 yellow except the black lateral margin; segments 6 — 7 black; tip of 

 abdomen yellow; valves of the ovipositor quite short and blimt. 



Holotype, cf, Igarape-assu, Para, Brazil, Jan. 29, 1912, 

 (H. S. Parish, coll.) 



Allotype, 9 , same locality and collector; Jan. 27, 1912. 



Type in Cornell University Collection. 



This insect differs considerably from all the described forms 

 in its small size and blue-grey coloration. 



EXPLANATION OF PLATES XXIV, XXV, XXVI. 

 The wings are all drawn to scale by the projection microscope in Cornell 



University. 



Fig. a. Wing of 9 Tipula maya, sp. n. 



Fig. b. Wing of 9 Tipula aymara, sp. n. 



Fig. c. Wing of cT Tipula inca, sp. n. 



Fig. d. Wing of 9 Tipula alacama, sp. n. 



Fig. e. Wing of cT Tipula gualo, sp. n. 



Fig. f . Wing of 9 Tipula smithi, sp. n. 



Fig. g. Wing of d' Tipula armatipennis, sp. n. 



Fig. h. Wing of cf Pachyrkina trinidadensis, sp. n. 



Fig. i. Wing of 9 Microtipula amazonica, sp. n. 



Fig. j. Hypopygium of Pachyrhina trinidadensis. (lateral aspect). 8t, 9t = 8th 

 and 9th lergites; 7s, 8s, 9s = 7th-9th stemites; c equals dorsal apical 

 appendage, j 1 = ventral apical appendage enlarged, j. 2 is tip of dorsal 

 apical appendage enlarged. 



Fig. k. Hypopygium of Pachyrhina macrosterna, sp. n. The ventral apical appen- 

 dage enlarged, ki tip of dorsal apical appendage, enlarged. 



Fig. 1. Hypopygium of Tipula inca (lateral aspect); h, (dorsal aspect). 



Fig. m. Hypopygium of Tipula aymara (lateral aspect) 

 mi. Looking into the genital chamber. 



Fig. n. Hypopygium of Tipula parishi, sp. n. (lateral aspect). 

 Hi, ventral aspect; n;. tip of dorsal apical appendage. 



Fig. o. Hypopygium of Tipula armatipennis. (lateral aspect). p=part of the 

 exserted penis. 



Fig. p. Hypopygium of Tipula guato. (lateral aspect.) 



Fig. q. Hypopygium of Microtipula amazonica (lateral aspect). (N. B.— The 9th 

 tergite is shown from a dorsal aspect.) 



Fig. r. Ovipositor of Pachyrhina macrosterna. (dorsal aspect). 



Ovipositor of Tipula aymara (dorsal aspect). 8t, 9t=8th and 9th tergites. 



u = upper valve (tergal); 1 = lower valve (sternal). si = ventral aspect. 

 Ovipositor of Tipula maya. (dorsal aspect). 



Fig 



u. Ovipositor of Tipula alacama (dorsal aspect). 



V. Ovipositor of Tipula armatipennis (ventral aspect), vi, lateral aspect,. 



9s=9th stcmite. 

 w. Ovipositor of Tipula smithi, (dorsal aspect), wi, lateral aspect. 



