OF WASHINGTON, VOLUME XVIII, 1916 187 



Calaphis castaneae (Fitch). 



Callipterus castaneae Fitch. 

 Calaphis castaneae (Fitch) Gillette. 



The original description of this species given by Fitch (1856) 

 is, although short, sufficient to characterize it, owing to the 

 striking coloration of the insect. Few references to the species 

 occur but it is by no means rare in the Eastern States and in some 

 localities it is quite abundant. 



In order to be positive of his determination the writer examined 

 the Fitch collection of Aphididae and located three pined speci- 

 mens bearing Fitch's label. Considering their, age and the 

 method of mounting, these specimens are in good shape and upon 

 mounting in balsam prove that the insects Fitch had were the 

 same species as that met with about Washington. In one speci- 

 men the radial sector is absent from the wing in much the same 

 way as in betulella Walsh. In fact a series of specimens show 

 that this vein varies greatly. Sometimes being strongly present 

 and sometimes very faint indeed. 



Alate viviparous female. Antennal measurements average as follows: I, 

 0.144 mm. ; 11, 0.08 mm. ; 111, 0.96 mm. ; IV, 0.544 mm. ; V, 0.432 mm. ; VI, 

 (0.176 mm +0-544 mm.). Segment HI, is finely imbricated and armed 

 with numerous fine bristle-like hairs not as stout as those of betulella. 

 On the basal half of the segment there are about eight circular sensoria. 

 The head is armed with hairs which are rather more prominent than those 

 of the two species mentioned previously. Cornicles somewhat shorter 

 than those of the type species being 0.096 mm. long and about as wide at 

 the base as they are long. 



Calaphis castaneoides, n. sp. 



Alate viviparous female. Morphological characters: Antennae as fol- 

 lows: 1, 0.096mm.; 11, 0.064mm.; Ill, 0.784mm.; IV, 0.432mm.; V, 0.368 

 mm.; VI, (0.16 mm. + 0.8 mm.); Segment 111, with 6 to 10 circular sen- 

 soria. Forewing 2.21 mm. long and about 0.738 in width. Cubital and 

 anal veins heavier than the media. Radial sector absent or but very 

 faintly indicated at one extremity. Cornicles 0.16 mm. long and about 

 0.192,mm. broad at base. Cauda and anal plate normal. 



Color characters: Very similar to those of castaneoe which the species 

 resembles greatly. Antennae with the basal half of segment IV and V and 

 often the middle of 111, light, or yellowish, the remainder dark. In this 

 the species differs from castaneos in which the antennae are uniformly 

 colored. Wings with the anal vein, the upper half of the cubital and the 

 lower margin of the stigma bordered with black. Tibiae and feet l>l:i<-k, 

 the middle portion of the tibiae often yellowish. 



