GENERIC CLASSIFICATION OF APHIDIDAE. 55 
Oestlund says it may be too close to Rhopalosiphum and compares it 
with nympliaeae. But had he compared it with ampuUata which he 
also included in Rhopalosiphum he would probably have found it 
quite similar, and it is the writer's belief that Oestlund's species is in 
reality Amphorophora. 
Finding that Macrosiphum was preoccupied Schouteden gave the 
new name Nectarosiphon to rubicola and Nectarosiphon, therefore, 
will become a synonym. In 1913, Del Guercio erected the genus 
Eunectarosiphon with rubi Kalt. as type. There appears not to be 
sufficient difference here, however. The insects are in their main 
points the same and Eunectarosiphon is placed, consequently, as a 
synonym. Van der Goot in the same year used ampuUata as the 
type of Rhopalosiphum. 
In 1900 Del Guercio used the name Macrosiphum for a genus 
including three species: Oonvolvuli Kalt., viciae Kalt., and nt&iKalt. 
He has since used both viciae and rubi as the types of other genera. 
This leaves only convolvuli in his Macrosiphum, and this species to all 
appearances is an Amphorophora. His Macrosiphum, therefore, is 
listed here under Amphorophora. 
Characters. — Head with prominent and slightly diverging antennal tubercles. 
Antennae of six segments, armed with circular sensoria. Wing venation normal. 
Cornicles long and somewhat swollen in the middle. Cauda elongate but much snorter 
than the cornicles. 
Type (monotypical), Amphorophora ampullat a Buckton. 
Genus CAPITOPHORUS Van der Goot. 
Plate VIII, A-C. 
1913. Capitophorus Van der Goot, Tijd. voor Ent., v. 56, p. 84. 
In the genus Capitophorus Van der Goot certain species suggest 
Rhopalosiphum in general characters, whereas others more nearly 
approach Myzus in their main characters. The capitate spines 
appear to be the best means of determining the genus. 
Characters. — Head with antennal tubercles which are not markedly prominent, 
these each with one or more prominent knobbed spines. Vertex with a central pro- 
jection on which similar spines are located. Antennse of six segments, armed with 
subcircular sensoria, the first segment with a projecting process on which one or more 
knobbed spines are located. Wing venation normal; cornicles long and slender, 
slightly constricted in the middle and somewhat enlarged toward the distal extremity. 
Cauda rather short and conical. 
Type (fixed by Van der Goot, 1913), Aphis carduinus Walker. 
Genus FRANCOA Del Guercio. i 
1917. Francoa Del Guercio, Redia, v. 12, p. 201. 
The genus Francoa Del Guercio appears very close in some respects 
to Capitophorus but on account of the peculiar frontal tubercle and 
the structure of the first antennal segment it is held to be distinct. 
i It seems doubtful if this genus is distinct from Capitophorus. We have been unable to make a careful 
study of the type. 
