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 o’, but antennz short; segments 1—5 light yellow, 
these gradually darkened; pleure 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 blunt. 
Holotype, o, Igarapé-assi, Para, Brazil, Jan. 29, 1912, 
(Ho Ss Parish, colle) 
Allotype, 2, 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 o Tipula inca, sp. n. 
Fig. d. Wing of 9 T1pula atacama, sp. n. 
Fig. e. Wing of o& Tipula guato, sp. n. 
Fig. f. Wing of 9 Tipula smith, sp. n. 
Fig. g. Wing of o Tipula armatipennis, sp. n. 
Fig. h. Wing of o& Pachyrhina trinidadensis, sp. n. 
Fig. i. Wing of 9 Microtipula amazonica, sp. 0. 
J 
Hypopygium of Pachyrhina trinidadensis. (lateral aspect). 8t, 9t=8th 
and 9th tergites; 7s, 8s, 9s=7th-9th sternites; 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. k, tip of dorsal apical appendage, enlarged. 
Fig. 1. Hypopygium of Tipula inca (lateral aspect); li, (dorsal aspect). 
Fig. m. Hypopygium of Tipula aymara (lateral aspect) 
m,. Looking into the genital chamber. 
Fig. n. Hypopygium of Tipula parishi, sp. n. (lateral aspect). 
ni, ventral aspect; ne, 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). 
Fig. s. Ovipositor of Tipula aymara (dorsal aspect). 8t, 9t=8th and 9th tergites. 
u=upper valve (tergal); 1=lower valve (sternal). s;=ventral aspect. 
Fig. t. Ovipositor of Tipula maya. (dorsal aspect). 
Fig. u. Ovipositor of Tipula atacama (dorsal aspect). 
Fig. v. Ovipositor of Tipula armatipennis (ventral aspect). vi, lateral aspect, 
9s=9th sternite. 
Fig. w. Ovipositor of Tipula smithi, (dorsal aspect). wi, lateral aspect. 
Fig. j. 
