FRUIT FLIES OF GENUS TOMOPLAGIA — ACZEL 347 



(0.20) mm. long) and approximately as long (0.70 (0.79) mm.) as 

 basally wide (0.70 (0.75) mm.) ; at apex it is 0.34 (0.38) mm. wide. 

 Middle and apical parts of ovipositor pale testaceous yellow, apical 

 part subshining, translucent and dorsoventrally flattened, in dorsal 

 aspect narrow-lanceolate and slightly narrowed before the tip. 



Types: Holotype cf (Coll. Blanchard), Argentina, Entre KIos, 

 Concordia, August 1936, trapped among citrus trees, K. J. Hayward 

 No. 3284, "T. costalimai n. sp. det. E. E. Blanchard." Allotype 9 

 (Coll. Blanchard), Argentina, Tucumdn, Tucumdn, August 16, 1936, 

 K. J. Hayward, "No. 5. T. distincta n. sp. det. E. E. Blanchard." 

 Paratypes: 2 (Coll. Blanchard), with same data as allotype; 9 (FML), 

 Brazil, "Citrus." 



This species was taken in fruit-fly traps among sweet orange trees 

 by Hayward (1941) in the provinces of Entre RIos, Corrientes, and 

 Misiones, and was reared from sweet orange and guava fruits (Hay- 

 ward 1942) in Tucumdn, Argentina. The types of this species and of 

 minattai were kindly submitted for description and inclusion in this 

 paper by Dr. E. E. Blanchard when he learned that a revision of the 

 genus had been planned. The writer preserves the original manu- 

 script names of Blanchard for both species, listed previously in appUed 

 entomological papers (Hayward 1941, 1942). 



Tomoplagia cressonif new species 



Figures 95,g-k; 97,c,d; Plate 20, figure 7 



This is the same species from southwestern United States, that 

 Cresson (1907, p. 100) mentioned as "Plagiotoma obliqua Say" from 

 Alamogordo, New Mexico, and which Hendel (1914, p. 38: "Cresson 

 erwahnt diese Form als T. obliqua Say") considered conspecific with 

 the Peruvian monostigma. It is closely related to the latter, more 

 closely than to obliqua or to the Brazilian biseriata, nevertheless it 

 may be distinguished from monostigma by the presence of a weak 

 lower mesopleural bristle, by a small brown apical spot on the scutel- 

 lum, and by the following comparative characters: the black spot on 

 the ventral pleurotergite does not extend to the dorsal; on the second 

 tergite there is always one pair of smaU pointlike dots, black to brown 

 in color; the sheath of ovipositor is slightly longer than wide at base. 



Male: Length 3.7 (3.6) mm.; wing 3.6 (3.8) mm. long, and 1.5 

 (1.5) mm. wide, about 2.5 times as long as wide. 



Head, together with antennae and mouthparts, entirely pale 

 ochraceous yeUow, 0.66 (0.70) mm. long, 1.07 (1.16) mm. wide and 

 0.98 (0.95) mm. high. Frons at vertex 0.57 (0.52) and at anterior 

 margin 0.38 (0.36) mm. wide, and in the median line 0.48 (0.48) mm. 

 long, shorter than wide at vertex; pale ochraceous yeUow, only the 

 geno vertical and ocellar plates are slightly infuscated. Oral margin 

 of mesofacial plate is raised and prominent. Postpedicel wide-oval, 

 0.22 (0.23) mm. long and 0.16 (0.15) mm. wide, 1.3 (1.5) times as long 



