2-4 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Verticals, Inner verticals: a pair of bristles in the vicinity of the 
vertex, usually marking the upper lateral limits of the frontal vitta, 
and approximately in line with the inner ends of the posterior orbits 
(PI. 1, figs. 3, 6). 
Lateral verticals, Outer verticals: a pair of bristles external to the 
verticals practically on the same line with them, one on each side, at 
the inner end of the posterior orbit. Present in females, less commonly 
in males (PI. 2, fig. 15, bvl). 
Fronto-orbitals, Orbitals: two, sometimes three bristles situated on 
each parafrontal plate near the eye orbit. Usually absent in males, 
present in females (PI. 2, fig. 15, hor.). 
Greater ocellars: a pair of proclinate, more or less divergent bristles 
arising just behind the anterior ocellus (PI. 1, figs. 3, 6, bgo.). 
Lesser ocellars: bristles, that are for the most part, irregularly 
arranged in rows that extend backward for a varying distance from the 
greater ocellars, of slight importance (PI. 1, figs. 3, 6, bio.). 
Postverticals: a pair of the most posterior lesser ocellars, distin- 
guished by their greater size (PI. 1, figs. 3, 6, bpv.). 
Occipito-centrals: a pair of bristles each situated behind and slightly 
below one of the verticals and generally in line with the latter and the 
last frontal (PI. 1, figs. 3, 6, boc). 
Cilia of the posterior orbit : a row of short bristles on the hind margin 
of the posterior orbit (PI. 1, fig. 3, cpo. ; PI. 2, fig. 7). 
Thora.v. 
For purposes of convenience the words anterior and posterior or 
postsutural are used to designate the position of the dorsocentral and 
aerostichal bristles in relation to the transverse suture. 
Hinnerals: three bristles, rarely more or less, inserted on the humeral 
callus (PI. 4, fig. 25, bhti.). 
Posthumerals: one to four bristles situated on the prescutum just 
behind the humeral callus; rarely absent (PI. 4, fig. 25, bphu.). 
Xotopleurals: bristles inserted on the sides of the prescutum. 
Generally parallel to the notopleural suture, though the anteriormost 
bristle is sometimes slightly the most distant (PI. 4, fig. 25, bnj^l.). 
Presidurals, Inner and Outer: two bristles situated slightly in front 
of the transverse suture on each side of the prescutum. The outer 
(PL 4, fig. 25, bpso.) is probably always present, and is inserted just 
above the presutural depression. The inner (bpsi.) is nearer the 
