The Crane-Flies of New York — Part I 853 



Plectromyia and Rhaphidolabis, they are 13-segmented; and in the sub- 

 genus Rhaphidolabina they are 15-segmented. 



TipuUdae, Cylindrotominae. — The antennae are apparently 16-scg- 

 mented in the genus Cyhndrotoma of the subfamily Cylindrotominae, 

 and 17-segmented in the genera Phalacrocera and Liogma. In Cylindro- 

 tovia tar sails (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, j) 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, i) 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. 



TipuUdae, 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 S-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 maxinunn dovolopnient in the species of the monilifera group 

 (of tropical America), in which a beadlike form is produced. Other 



