122 Journal Xew York Entomological Society, t^'o'- >^-^n. 



Gonomyia rcciirvata differs from its nearest described relatives, 

 amazona Alexander and pleuralis Williston in the male hypopygium, 

 the two chitinized appendages to the pleurites, the extremely elongate 

 and straight dorsal gonapophyses and the remarkable recurved ventral 

 gonapophyse. 



Gonomyia (Leiponeura) calverti, new species. 



Puella group ; basal antennal segments tinged with brown ; male hypo- 

 pygium without a recurved ventral hook ; ventral portion of the hypopygium 

 with two rounded, flattened lobes each of which bear 8 or 9 chitinized teeth. 



Male, length, 3.4 mm. 



Male. — Rostrum and palpi brown ; the enlarged basal segments of the 

 antennae brown, not orange, flagellum light brown. 



Mesonotal prsescutum very light grayish brown without distinct markings ; 

 the pronotum, a narrow lateral margin to the praescutum and the median line 

 of the scutellum yellowish ; scutum and postnotum light brown ; scutellum yel- 

 low, more brown at the base. Pleurje without distinct stripes. Halteres light 

 brown, the knob yellow. Legs, light yellowish brown, the individual segments 

 scarcely darkened at tip. Wings subhyaline with iridescent reflexions, veins 

 brown, stigma lacking. 



Abdomen light brownish yellow, the tergites rather darker than the stern- 

 ites. Hypopygium having the pleural pieces (fig. 7) long, slender, slightly 

 curved, clothed with sparse long hairs ; the tip is suddenly narrowed, more 

 chitinized and ending in two long curved bristles. Ventrad of the pleurites 

 is an enlarged cylindrical tube which is produced dorsally into a long obtuse 

 point, and ventrally into two hand-like flattened organs armed with 8 or 9 

 chitinized teeth as shown in fig. 8, d ; these flattened organs are directed 

 ventrad and entad. From inside this genital chamber, near the dorsal wall 

 project two subchitinized elongate flattened appendages (c). 



Holotype, male, Alajuela, C. R. ; alt. 3,100 ft.; Sept. 15, '09 (Dr. 

 P. P. Calvert). 



Type in the collection Acad. Nat. Sci. Phil. 



This species is similar to pitclla Williston in its pleural and wing 

 patterns but the basal segments of the antennae are suffused with 

 brown and the hypnpygium is very different from that shown in 

 Williston's figure^ which shows a prominent recurved ventral hook. 



Tribe Timxopiiilini. 



Genus LIMNOPHILA Macquart. 



Limnophila guttulatissima Alexander. 



One female from Cartago, C. R., along a ditch on Feb. 26, 1910. 



1 Trans. Ent. See. Lond., 1896, pp. 288, 289, pi. to, fig. 60 a. 



