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ENTOMOLOGICAL NEWS. 
345 
Mallali, March ii, 1913 (Parish); S, Roseau, Dominica, 
British West Indies, June 22, 191 1 (Lutz.) 
The Guiana material, represented only by females, was de- 
termined as G. (L.) alexanderi Johnson in my paper on Brit- 
ih.h Guiana Tipulidae (Trans. Am. Ent. Soc, vol. 40, p. 242, 
1914) ; the Peruvian specimens were determined as probably 
representing a new species closely allied to alexanderi (Trans. 
Am. Ent. Soc, vol. 42, p. 17, 1916.) 
The two species, G. alexanderi Johnson (Nearctic) and G. 
helophila sp. n. (Neotropical) are closely allied and may be 
separated most readily by the structure of the male genitalia, 
these differences being expressed as follows : 
Fig. 1. — Wing of Gonomyia (Leiponeura) helophila sp. n. 
Fig. 2. — Wing of G. (L.) alexanderi Johnson. 
Fig. 3. — Pleurite and appendages of the male hypogygium of G. (L.) helophila : d, 
dorsal appendage ; v, ventral appendage. Dorsal aspect. 
Fig. 4.— The same for G. (L.) alexanderi. 
Fig. 5.— Wing of Eriocera aetherea sp. n. 
Fig. 6. — Wing of Erioeera domingemis sp. n. 
Dorsal pleural appendage triangular, the caudal angle a prominent 
spine that is heavily chitinized apically ; middle pleural appendage 
apparently lacking; ventral pleural appendage with a broad flattened 
blade, the inner caudal margin with about five or six acute, chitin- 
ized, appressed teeth of which the innermost is the largest (see figs. 
2, 4). alexanderi Johnson 
