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which I have placed it. In form, and especially ornamentation, it 

 corresponds very closely with an undescribed Jassid found abun- 

 dantly on willows in New York, that I have placed in Ca/liscarta, 

 but this latter form has the elytral venation of Cicadiila, while the 

 present species agrees in this respect with Thamnotettix, where I 

 prefer to place it for the present. This is one of those not uncommon 

 cases where a species exists apparently for the sole purpose of puz- 

 zling the entomologist and showing him how little Nature appreciates 

 his laboriously-founded and nicely-discriminated genera. 



It affords me pleasure to dedicate this neat little Jassid to its 

 discoverer, who is too well known to require words of commenda- 

 tion from me, else freely given. 



7 Thamnotettix geminata n. sp. 



Form of Cicadula d-notata Fall., but larger. Dull green or greenish 

 brown. Head yellowish white; anterior edge of the vertex with four large 

 black spots; disc of the scutellum with two small, approximate, black points. 

 Length 4.5 mm. 



Head hardly as wide as the pronotum; obtusely rounded before, finely 

 punctured. " Vertex about one-fourth longer at the centre than next the eye, 

 base with a fine impressed line. Sides of the front almost straight, slightly 

 incurved toward the apex. 'Clypeus narrow, widened toward the obtusely 

 rounded apex. Cheeks obscurely angled below the eyes. Pronotum scarcely 

 angled at the sides, the posterior margin straight; surface with fine, trans- 

 verse striae and distant, scattering punctures. Basal ventral segment broad, 

 posterior edge arcuated. 



Color: Head yellowish white, tinged with fulvous on the disc of the ver- 

 tex and around the eyes; short impressed line on the vertex and sutures of 

 the front black; a large black spot occupies the apex of the head each side of 

 the tip, and there is another on the margin of the vertex immediately behind 

 each ocellus; antennal cavity and a few faint, transverse lines on the front 

 black. Antennae pale. Eyes black; pronotum dull greenish brown; behind 

 the anterior margin is a black, wavy line, which becomes obsolete before 

 reaching the lateral angles. Propleura sulphur-yellow, the other pleural 

 pieces yellow on their outer half, their discal half and the sternal pieces black. 

 Scutellum greenish yellow; transverse impressed line, two approximate black 

 points before it, and a small triangle somewhat remote from each basal angle 

 black. Elytra brownish hyaline, obscured toward the sutural margin; ner- 

 vures slender, but distinct, pale, embrowned toward the apex. Wings hya- 

 line, iridescent, nervures fuscous. Abdomen black, connexivum yellow. 

 Legs pale whitish yellow; posterior tibicC with a black line on the inner edge, 

 their tarsal joints touched with brown. Last ventral segment and p\gofers 

 soiled white, the latter suffused with ferruginous. 



Last ventral segment longer than the penultimate; posterior margin pro- 

 duced in a short angle each side of the middle, where there is a shallow in- 

 cision on either side of the short, blunt central tooth; pygofers broad, aij- 

 ruptiy reaching the end of the ovipositor. 



