154 "T^E CANADIAN ENTOM'O'LOTtIST 



(xoiioiiiyia (Gonomyella) thiosema, sp. n. 



General coloration yellow; centre of the vertex dark brown; mesonotal 



praescutum with three broad stripes; median sclerite of postnotuni broadly 

 dark brownish black; pleura yellow with a narrow dark brown stri|)e; legs 

 dark brown, the femoral bases paler; wings with a taint brownish tinge; male 

 hypopygium with 'two flattened pale pleural appendages. 



Male. — Length 5 mm. ; wing, 4.S mm. 



Rostrum brown ; palpi dark brown. Antennal scape sulphur-yellow; 

 flagellum dark brown. Head obscure yellow, the centre of the vertex largely 

 dark brown. 



Pronotal scutum brown, yellowish laterally; scutelknn sulphur-yellow. 

 Mesonotal praescutum light brown, the lateral margins and liumeral region 

 yellow; a small brown spot on the lateral margin of sclerite; three broad dark 

 brown stripes; scutum obscure brownish yellow, the lobes dark" brown; scutellum 

 brown, broadly margined with yelbw ; postnotum broadly brownish black medially, 

 the anterior lateral regions yellow; lateral sclerites of postnotum yellow, the 

 caudal margins brownish black, these areas lying immediately before the 

 halteres. Pleura sulphur-yellow, narrowly striped longitudinally with dark 

 brown; sternites reddish brown. Halteres dark brown, the basal half of the 

 stem paler. Legs with the coxae yellow, the basal half of the. fore coxae dark 

 brown ; trochanters yellow ; remainder of legs dark brown, the femoral bases 

 obscure yellow. Wings with a faint brownish tinge; veins dark brown. Vena- 

 tion; Sc long, vSc,, ending just beyond midlength of Rs, Sc^ some distance from 

 the tip of Sc^, the latter alone about equal to r-ni ; Ks long, very gently arcuated; 

 r on R^+ at about two-fifths its length; R ^ oblique, parallel to ultimate section 

 of i?, , shorter than R^ ; petiole of cell 2nd M'> about equal to cell ; basal deflection 

 of Cm a short distance beyond the fork of M. 



Abdomen dark brown ; sternites obscure brownish yellow. Male 

 hypopygium with the pleurites stout; the proximal face densely set with a 

 cushion of slender setiferous tubercles; apex of pleurite tipped with a short 

 cylindrical lobe that is provided with a pencil of stiff yellow bristles. Two 

 pleural appendages, the outer one very pale and flattened, the apex directed 

 proximad; inner appendage shorter, more chitinized, flattened, on the face with 

 two setiferous tubercles. Penis-guard stout, the apex simple. 

 Habitat. — Argentina. 



Holotypc, c^, Famailla, Tucuman, (3ctober. 1920 (V. Weiser). 

 Type in the collection of the La Plata Museum. ' " . 



Gonomyia (Leiponera-a) inisera, sp. n. 



Rostrum reddish ; antennae black, the enlarged second scapal segment a 

 little reddish basally ; general coloration pale brownish testaceous; pleura 

 testaceous yellow ; wings subhyaline, unmarked ; male hypopygium with the outer 

 angles of the pleuntes produced into stout pale spines, the tips blackened and 

 densely covered with short, appressed hairs; penis-guard stout, pale, longer than 

 the remaining elements of the hypopygium. .^ 



Male. — Length 3.5—3.6 mm. ; wing 3.8—4 mm. 



Peniale. — Length 3.5 — 3.S mm.; wing 4 — 4.1 mm. 



Rostrum reddish; palpi dark brown. Antennae black, the enlarged 



