August, '17] ESSIG: TOMATO AND LAUREL PSYLLIDS 437 



before the middle; M1+2 parallel with the wing-axis M3+4 almost straight, Cui evenly 

 arcuate. Nervature fine, white yellowish, transversal nervules colorless. Mem- 

 brane vitreous. No spines on either side of the elytra-membrane; the marginal 

 spines only present and very distinct, forming very narrow, high groups in the cell, 

 Rs, Mi+2, Cu. 



Hind-wings and legs as usual in the genus. 



Apex of the male abdomen: genital segment of equal breadth and height, 0.17 

 mm. ; its posterior and inferior margin evenly arcuate, anterior half of the upper side 

 moderately arcuate; no tubercles; hairs of moderate size, equally scattered on the 

 surface. Color black. Forceps shows the form of a scythe with its edge anteriorly; 

 posterior margin straight, the anterior sinuate; height 0.17 mm., breadth 0.04 mm.; 

 if viewed from behind has the forceps also the form of a scythe, but its edge is turned 

 inwardly and bears at the base a small obtuse tooth ; above are the ends of the forceps 

 curved like cattlehorns; hairs equally scattered on the surface. Color brownish. 

 Anal segment 0.17 mm. high, produced posteriorly in a triangular lobe; very long 

 setae especially on its distal end; color brown. 



Apex of the female abdomen. Anal segment viewed from above short, triangular, 

 obliqueh' truncate at the end; viewed laterally on a preparate boiled in KOH and 

 mounted in glycerin 0.28 mm. long by 0.12 mm. high; its upper margin slightly arcu- 

 ate rounded at the end; inferior margin straight, slightly excised before the apex; 

 long hairs scattered on the sides, on the upper margin and just under it short, strong, 

 acute spiniform hairs, before the apex a few long, stout and around the anus short 

 little hairs; on the whole surface of the segment very small, short, acute spines in 

 rows parallel with the superior margin. — Anus 0-shaped; upper length 0.20 mm., 

 under-length 0.15 mm.; hinder-length 0.24 mm.; apex short acute, its inferior margin 

 straight, the whole surface of the side with long scattered hairs, the hinder half of 

 it with very short, small, acute spines in rows parallel with the posterior margin. 

 External sheath narrowing behind with roundly truncate apex, reaching over the 

 end of the anal segment. The inner stylets straight, obliquely truncate on the under- 

 side before the apex; the apex itseK acute with two triangular teeth above. The 

 innermost stylets triangular on their end. Color of the anal and genital segments 

 dark brown, sometimes with a few whitish spots. 



Length 2-5.3 mm. to the end of closed wings.^ 



Life-History 



The winter is passed in the adult stage on evergreen food plants or 

 in sheltered places elsewhere. Eggs are laid late in April and until late 

 fall and early winter in the mild climate of this state. The broods are 

 exceedingly uneven and all stages of the insect may be found from 

 May until the middle or even the last of November. The average 

 length of time required from egg to adult and the number of broods 

 a year are very difficult to fix because of the great amount of variation 

 and uncertainty due to differences in seasons and the difficulty in 

 determining the same. However, there are from three to many over- 

 lapping broods each year. 



1 Sulc, Karel, Acta Soc. Ent. Bohemia?, VI, pt. 4, pp. 105-108, 1909. 



