12 MAINE AGRICULTURAL EXPERIMENT STATION. IQII. 



drical and without lateral processes. At the geniculation the 

 copulatory organ is enlarged and knob-shaped. From a lateral 

 aspect the forceps widen out near the tip. The tip on the inner 

 surface has 2 blunt processes not claw-like as in galeaformis, 

 and the inner setae at the tip are much more numerous than in' 

 galeaformis. Fig. 7 will give an idea of some of these charac- 

 ters. 



Female. The lateral aspect of the genital segment (Fig. 6) 

 shows the following characters for the female. The dorsal line 

 of the supra-genital plate is nearly straight to near the tip where 

 the end of the plate is abruptly and conspicuously turned up. 

 The setae of this plate are scattered but long, and they are not 

 present at the tip. Numerous setulae, small and blunt, give the 

 plate a pebbly appearance when viewed through a 1-6 in. objec- 

 tive. Circum-anal wax glands are present. The subgenital plate 

 has a pointed end and the surface is very sparingly supplied 

 with setae the length of those upon the supra-genital plate. The 

 ovipositor and the very broad sting-palpi extend beyond the 

 upper and lower plates. Fig. 6. 



Psylla galeaformis n. sp. 



Specimens of this species have been taken from the leaves of 

 the Alder, Alnns incana, July 26, 1905 ; August 17, 1905, and 

 September i, 1910. In head and wing characters it is so much 

 like floccosa that they might easily be taken for the same species. 

 These 2 alder species can, however, be definitely separated on 

 the characters of the genitalia as will be seen from the accom- 

 panying descriptions and figures. The frontal cones of galea- 

 formis are relatively shorter and blunter than in floccosa and the 

 wings are yellow which distinguishes them from the hyaline, 

 colorless wings of floccosa. 



The general body color of a well colored specimen is pale yel- 

 lowish brown beneath and dark brown dorsally. Head reddish 

 orange dorsally, rest pale yellowish brown. Thorax with lobes 

 veddish amber marked with white curved lines, the lobe of the 

 metathorax being redder than the others. Legs are pale yellow- 

 ish brown. The fore-wings are transparent and a pale golden 

 brown in color with veins brown except at base, where they are 

 greenish. Abdomen with about 7 dark brown transverse heavy 



