Tue CRANE-FLIES or NEw York — Part I 853 
Plectromyia and Rhaphidolabis, they are 13-segmented; and in the sub- 
genus Rhaphidolabina they are 15-segmented. 
Tipulidae, Cylindrotominae.— The antennae are apparently 16-seg- 
mented in the genus Cylindrotoma of the subfamily Cylindrotominae, 
and 17-segmented in the genera Phalacrocera and Liogma. In Cylindro- 
toma tarsalis (fig. 125, k) the flagellar segments in the male are elongate- 
cylindrical, with a dense erect pubescence and a very few scattered bristles. 
In Phalacrocera tipulina (fig. 125, 3) the condition is fairly similar, but 
there is a distinct verticil of stiff bristles near the bases of the segments, 
a condition strongly suggesting that found in the genus Tipula. In 
Liogma nodicornis (fig. 125, 1) the intermediate flagellar segments are 
rather strongly pectinate, with a dense, pale pubescence and several long 
bristles on the back face of each segment, and with shorter, weaker bristles 
at the apex of the pectination. 
Tipulidae, Tipulinae.— Dolichopezini: The antennae in Dolichopeza, 
Oropeza, Brachypremna, and other genera of the tribe Dolichopezini, 
are normally 13-segmented; in the American species of the genus Megisto- 
cera the antennae are 8-segmented. The organ is often considerably 
elongated, exceedingly so in Old World species of Megistocera. In Brachy- 
premna the antennae are correspondingly short and tiny. 
Ctenophorini: In the tribe Ctenophorini the antennae are 13-segmented. 
In the male sex they are curiously pectinated or fanlike, tho differing 
in construction from those in Rhipidia already discussed (page 851). 
In Ctenophora angustipennis (fig. 125, m) the first segment of the flagellum 
bears a basal pectination and two apical pectinations, each tipped with 
a bristle; the second and succeeding segments have a basal pair of 
pectinations, each tipped with a bristle, and a pair of apical appendages, 
untipped. In Tanyptera frontalis (fig. 125, L) the first segment of the 
flagellum bears a basal and an apical pectination; the second and succeeding 
segments have a basal pair of pectinations, each tipped with a bristle, 
and the single shorter apical pectination is not thus protected. 
Tipulini: Normally the antennae in the tribe Tipulini are 13-segmented; 
in some species of Nephrotoma there are 16 or 19 segments in the male. 
In most species of this tribe each flagellar segment has a strong basal 
swelling armed with a verticil of strong bristles; this knobbed condition 
reaches its maximum development in the species of the monilifera group 
(of tropical America), in which a beadlike form is produced. Other 
