SANBORN : KANSAS APHIDID.E. 81 



IV, 0.66 mm. ; V, 0.61 mm. ; VI, 0.16 mm. ; VII, 0.97 mm. ; 

 total length, 3.08 mm. ; omitting the last two segments, equal 

 to the length of the body. Sensoria circular, unequal in size ; 

 twelve to twenty on the third joint, none on the fourth, the 

 usual distal one on the fifth, five or six small ones bordering a 

 larger one at the distal end of the sixth. Eyes black ; ocular 

 tubercles prominent; ocelli conspicuous, with black borders. 

 Beak black on the distal half, remainder pale, 0.63 mm. long, 

 extending to the mesocoxse. 



Thorax all dark green. Wings hyaline ; discoidals black, 

 costals dark brown; stigma dark, and 0.18 mm. broad by 0.81 

 mm. long. Total wing expansion, 7.85 mm. Legs long; the 

 tarsi, distal part of the tibia and the femora black, remainder 

 greenish yellow. All parts hirsute. 



Abdomen greenish gray. Honey-tubes dark, imbricated, 

 cylindrical, and 0.54 mm. long, being three times the length of 

 the tarsum, extending nearly to the tip of the style. Style con- 

 colorous with the abdomen, slightly hirsute, long, and narrow, 

 being two-thirds the length of the honey-tubes, or 0.36 mm. 

 It is armed with short spines and has one characteristic long, 

 setaceous hair located on the dorso-median line near the distal 

 end. The style is 0.36 mm. long, or two-thirds the length of 

 the honey-tubes. Total length of the body, 4.11 mm. 



This form was taken October 23, on the ventral side of the 

 leaf of a Cucurbitacea vine. 



Phorodon sp. Plate XX, fig. 96. 



Head black. Antenn^B black and hirsute ; first joint gibbous, 

 0.10 mm. long ; II, 0.07 mm. ; III, 0.50 mm. ; IV, 0.27 ram. ; 



V, 0.23 mm. ; VI, 0.09 mm. ; VII, 0.41 mm. ; total length, 

 1.67 mm. The third joint has about twenty-four moderate- 

 sized, irregularly-placed circular sensoria. The fourth joint 

 has two or three sensoria on its basal half. The usual one is 

 present near the distal end of the fifth joint. A cluster of 

 about six or seven small ones are present at the union of the 

 sixth and seventh joints. The frontal tubercles are each de- 

 veloped into prominent projections, which are equal in length 

 to the front joints of the antennae. The eyes are very dark red 

 in color, and the ocular tubercles are small. The ocelli are not 



6-Ball., Vol. Ill, No. 1. 



