222 Aini(i/s liiitoDioloii^ical Society of America [X'A. Ill, 



of the white areolar spots. The face is pale yellow, but little 

 darkened on the base of the front and sides of the cheeks, with 

 the pale angular line distinct. The genital characters of the fe- 

 male are very close to those of acutiis, but the last ventral seg- 

 ment is more carinated with its apex distinctly notched when 

 viewed from l)elow. In the male these characters are very dis- 

 tinctive. Last ventral segment longer, not shorter, than the 

 ])receding; valve shorter; plates maich shorter, rounded, about 

 two thirds the length of the valve; pygofers broad, exceeding the 

 plates l)y about the length of the latter and similar to them in 

 color and texture. Prof. Osborn's type was taken by me at 

 Phoenicia, X. \ .. I have taken another female at Niagara Falls 

 and a male at Boulder, Colorado, and another at Ogden. Utah, 

 and Mr. Palmer took one at Ouinze Lake. Quebec. 



\). Platymetopius slossoni n. sp. 



Very close to aciitus but smaller with a longer and more 

 acute vertex and shorter male pygofers. Length 4 mm. 



Vertcxlongand acute at apex, still longer than in oregoncusis and latus 

 rather more than twice as long as wide between the eyes and ob\-iously 

 longer than the pronotvim and scutcllum together; marked with three 

 jjale longitudinal lines as in aciilus; the lateral curved, becoming api)rox- 

 iinate and parallel for a short space at base. Face light yellow with the 

 angled base of the front and sides of cheeks broadly distinctly infus- 

 eated, the former with a very distinct acutely angled concentric white 

 line which is j^rojected to the apex of the head and is strongly repro- 

 duced behind the eyes. Pronotum with the longitudinal vitta,' distinct 

 as in acutus. Beneath and abdomen dark fuscous; in the female ob- 

 scurely marked or irrorate with \m\q in i)laces; last ventral segment 

 shajx'd as in aciilus, whitish at base with about four black ligulate marks 

 on the basal margin. In the male the pe'ctus and abdomen are deep 

 black, obscurely marked with ]jale on the venter and at the ti]) of the 

 valve; last \-entral segment angularly but not dec])ly emarginatc; valve 

 triangular, subacute at ajx-x; plates rather broad-triangular, on their 

 sutural margin as long as the vah'e, their outer edges moderately sin- 

 uated and fringed with bristles, their a])ex a little narrower than in 

 luulns; jjygofers slightly but distinctly shorter tlian the i)lates which 

 they scarcely exceed at the sides. 



Described from one pair taken at Jacksonville, Fla., in 

 May, H)l(), by Mrs. Annie Trumbull Slosson whose enthusiasm 

 and industry have added so much to our knowledge of the insect 

 fauna of Florida and other ])arts of the eastern United States. 

 1 took a good .series of what is certainly the same species at 

 Crescent Citv, Sanford, Sevenoaks and I'""!. Mvers, Florida. 



