186 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



Calaphis betulella Walsh. 



Measurements of antennae of the alate viviparous female are as follows : 

 IV, 1.04 mm.; V, 0.752 mm.; VI, (0.24 mm. + 0.56 mm.). Segment 111, 

 almost smooth or very finely imbricated, armed with many short stiff 

 spine like hairs about 0.048 mm. long and armed on its basal half with 12 

 or 13 small almost circular sensoria. Segment IV, more distinctly imbri- 

 cated and armed with similar spines, but without sensoria. Segment V, 

 like segment IV, with the imbrications most distinct distad, and with an 

 elongate fringed distal sensorium fully 0.128 mm. long. Segment VI, 

 with a similar elongate fringed sensorium at base of unguis. Head with a 

 few hairs but with no capitate ones. Cornicles 0.144 mm. long and 0.112 

 mm. wide at the base, tapering and somewhat flaring. 



Galaphis betulaecolens (Fitch). 



Aphis betulaecolens Fitch. 



Callipterus betulaecolens Monell. 



Callipterus betulae Thomas. 



Callipterus betulaecolens (Fitch) Oestlund. 



Siphonocallis betulaecolens (Fitch) Del Guercio. 



Calaphis betulaecolens (Fitch) Gillette. 



The color characters of this species were well given by Walsh in 

 his original description. 



This species was described as an Aphis by Fitch (1851). Later 

 Monell (1879) described his Callipterus of the same name, not 

 knowing positively that it was the same species. Oestlund 

 (1887) referred MonelFs species to Fitch's name. The excellent 

 description given by Davis (1910) is referred positively to Mon- 

 ell's species which Davis knew, but doubtfully to Fitch's species. 

 In the National Museum collection there are two specimens of 

 betulcecolens bearing Fitch's label and marked type. 



These specimens are part of the original lot in the Fitch col- 

 lection and they were mounted from that collection by Mr. 

 Theo. Pergande. Through the kindness of Mr. Davis the writer 

 has had an opportunity to examine Monell's type and this agrees 

 in all details with Fitch's specimens. There is therefore no doubt 

 that the two species are the same. 



Following are a few notes on the alate viviparous female: 



Antennal segments, average measurements 1, 0.144 mm.; 11, 0.08 mm.; 

 Ill, 0.96 mm.; IV, 0.7 mm.; V, 0.544 mm.; VI, (0.144 mm. + 0.56 mm.). 

 Segment 111, is armed with 10 to 13 oval sensoria on the basal half and 

 somewhat imbricated distad. Segment V, has the distal sensorium fringed 

 and somewhat elongate though not nearly as elongate as that of betulella. 

 The sensorium at the base of the unguis of VI, is likewise not as elongate 

 as in the species mentioned. Head with a few hairs. Cornicles about 

 0.144 mm.; long, nearly cylindrical though somewhat tapering and flaring. 



