194 NEW YORK STATE MUSEUM 



terminal segment slightly pro onged, irregularly subconic, the apex 

 nan-owly romided. Palpi; the first segment rather long, subquad- 

 rate, second much swollen at the basal third, irregular, the third 

 nearly twice the length of the second and the fourth a little longer 

 than the third. Face yellowish. Mesonotum reddish brown with 

 distinct lighter submedian Hnes ornamented mth yellowish hairs, 

 posterior median area yellowish. ScuteUum reddish brown with 

 sparse apical hairs, postscutellum and abdomen a slightly variable' 

 reddish brown. Wings hyaline, costa pale yellomsh brown. Hal- 

 teres yellowish transparent basally, cannine apically. Legs long, a 

 nearly uniform pale straw color; claws probably simple. Genitalia 

 basal clasp segment stout, tapering; terminal clasp segment large, 

 strongly curved, excavated internally, with a conspicuous apical 

 spur. Dorsal plate broad, broadly emarginate, ventral plate ap 

 parently represented by a pair of widely separated, strongly curved, 

 truncate lobes. Harpes short, stout, strongly chitinized, fused 

 basally, curving from the median line, distally broadly rounded an 

 with a heavily chitinized apex; style long, slender, strongly curved 

 (Plate 7, figure 3). Type Cecid. 119. 



OLIGOTROPHIARIAE 



Members of this tribe may be distinguished by the third vein 

 being well separated from the anterior margin, the rather short, 

 cylindric antennal segments, usually stemmed in the male and the 

 simple claws, or with the claws at most minutety toothed. This 

 group comprises a large number of mostly good sized, usually red- 

 dish or reddish brown species. There is a marked tendency toward 

 reduction in the nimniber of palpal segments, this being particularly 

 e\4dent in the large genus Rhopalom^ia, a natural gi'oup displa^-ing 

 a marked fondness for the tender tissues of leaf and flower buds. 

 There is a great variation in the number of antennal segments, 

 there being a range of from 12 to 26 in both Ph^-tophaga and 

 Rhopalomyia. Omng to variations in antennal, palpal, alar and 

 other structures, it is very difficult to establish the genera satis- 

 factorily. Two European genera, M i k i o 1 a Kieff . and P s e c - 

 trosema Kieft"., and the Brazilian Uleia Rubs, are so insuf- 

 ficientl}^ described or present so little modification that we have 

 been unable to give satisfactory diagnostic characters for their 

 separation from American genera. The genus M i k i o 1 a Kieff. is 

 e\'idently closely allied to the larger forms of P h y t o p h a g a 

 Rond. As understood b\' us we are unable to find satisfactory 

 characters for the separation of the two. It is admitted that our 

 present grouping of species under Ph;^i;ophaga, Oligotrophus and 

 Janetiella is not entirely satisfactory, though we question the wisdom 



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