. Annual report of the Regents . Fig. 10—Wings of the pear tree Psylla; c,clavus; c. «., claval suture; s, stigma. Ninth Befori of the Si ate Entomologist 319. Through tlie kindness of Mr. M. V. Slingerland, of the Cornell University, Ithaca, N. Y.,we are enabled to presentthe excellent figures of theinsect in its immature andperfect stages which illus-trate this notice. Figure9 represents the insect in Fig. 11—Head of the pear-tree Psylla: a, front view; 6, •, .4? + r\ A i^nrm- antenna greatly enlarged: c, ffontal cones; o, ocelli. ItS periect Wingea Stage; in Figure 10 the venation and marki

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. Annual report of the Regents . Fig. 10—Wings of the pear tree Psylla; c,clavus; c. «., claval suture; s, stigma. Ninth Befori of the Si ate Entomologist 319. Through tlie kindness of Mr. M. V. Slingerland, of the Cornell University, Ithaca, N. Y.,we are enabled to presentthe excellent figures of theinsect in its immature andperfect stages which illus-trate this notice. Figure9 represents the insect in Fig. 11—Head of the pear-tree Psylla: a, front view; 6, •, .4? + r\ A i^nrm- antenna greatly enlarged: c, ffontal cones; o, ocelli. ItS periect Wingea Stage; in Figure 10 the venation and markings of the wings are shown, greatlyenlarged; Figure 11 gives enlargements of the head and antenna*, show-ing the two characteristic bristles at the tip of the antenna. The Family Psyllidae, The family to which this species belongs is nearly related to theAphides {Aphididcp), or plant-lice, coming next to it among theHomoptera in classification, but are stouter forms and of firmer general appearance the winged insects look like miniature head is broad, short, generally triangular in front, where it iscleft or bilobed with the

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Keywords: ., bookcentury1800, bookdecade1880, bookidannual, booksubjectscience