966 Charles Paul Alexander 



small, setiferous tubercles, one above each wing axil, the other four arranged in a trapezoid 

 on dorsum with the anterior pair closer together; metanotum with six setiferous tubercles, 

 four of which are median in position, the other pair at antero-lateral margin, near base of 

 halteres. Wing sheaths ending about opposite apex of second abdominal segment. Leg 

 sheaths ending before apex of third abdominal segment. 



First abdominal segment similar to metanotum; segments 2 to 7 indistinctly subdivided 

 into a narrow basal ring and a much broader posterior ring; basal ring unarmed except for 

 a seta on pleural margin and a trapezoid of tubercles on sternum; posterior annulus armed 

 as follows: tergites with four tubercles arranged in a quadrangle and located in the dark 

 median stripe, posterior tubercles with a stiff seta just laterad of each; a lateral seta on a 

 line with anterior tubercles; two lateral setae on a level with posterior tubercles, the proximal 

 one considerably the larger; these setae located in the yellow sublateral stripe; pleural margin 

 with two setiferous tubercles with an acute subappressed spine between them; a seta immedi- 

 ately ventrad of anterior tubercle; on segments 6 and 7, spine closer to caudal margin of 

 segment, and tubercle beyond it lacking; sternites with a trapezoid of naked tubercles on 

 basal ring, posterior pair the closer together; a trapezoid of larger setiferous tubercles on 

 posterior ring, anterior pair the closer together; posterior punctures each having two setae, 

 with an additional slender seta laterad of these in the lateral dark stripe; dorsum of segment 

 6 (Plate LXXXIII, 450) with posterior pair of tubercles replaced by two powerful lobes 

 directed caudad and laterad; segment 7 unarmed on dorsum, sternum with two acute spines 

 near caudal margin; segment 8 with lateral angles produced dorsad into slender lobes which 

 are spinous on all the faces; caudal angles directed caudad into slender lobes, acute at tips 

 and with anterior inner face spinous and bearing a few setae. Male cauda with sternal 

 valves very blunt and rounded, on either side of ventro-median hne produced caudad into an 

 acute spine. Female cauda with dorsal acidothecae a little longer than the more slender 

 sternal valves, both pairs much exceeded by caudal angles of eighth segment. 



Nepionotype. — Larva, Denmark. 

 Neanotype. — Pupa, Denmark. 

 Paratypes. — One larva and one pupa. 



(The writer is indebted to Dr. C. Wesenberg-Lund for this material, 

 as well as for several other interesting European crane-fly life histories.) 



Genus Cylindrotoma Macquart (Gr. cylinder + 1 cut) 



1834 Cylindrotoma Macq. Suit, a Buff., vol 1, Hist. Nat. Ins., Dipt., p. 107. 



Larva. — Body covered with simple tubercles, a median dorsal row and a double ventral 

 row. Spiracular disk large, surrounded by small lobes. Head capsule compact. Mentura 

 with about fifteen teeth. 



Pupa.- — Pronotal breathing horns short, cylindrical, directed strongly ventrad. Meso- 

 notum with two flattened lobes directed cephalad. Abdomen unarmed with spines or lobes. 



Cylindrotoma is a small genus including six species distributed thruout 

 the North Temperate Zone, three of these species occurring in North 

 America. 



