The Crane-Flies of New York — Part II 941 



Pupa. — Length of cast pupal skin, about 0.5-7 mm. 



Cephalic crest small, blunt. Labrum triangular, apex obtusely rounded. Labial lobes 

 subcircular, outer margin rounded. Sheaths of maxillary palpi short and stout, at apex 

 suddenly narrowed (Plate LXXVII, 414). Antennal sheaths angulated at segments, the 

 organ extending to beyond base of wing. Pronotal breathing horns (Plate LXXVII, 413^ 

 with extreme base expanded, the neck short, constricted, soon passing into a greatly 

 expanded and very compresszd disk, the whole suggesting a fan or certain polypores; margin 

 of this disk entire or gently crenulated, and sloping from ventral side outward; surface finely 

 nerved and reticulated. Mesonotum somewhat precipitous, crest (Plate LXXVII, 412) 

 tumid, v/ith rounded knobs arranged transversely along it, there being about eight isolated 

 knobs and a more elongate one along shoulders, these knobs covered with minute blackened 

 spicules. Lateral margin of thorax above wing root forming almost a right angle. Wing 

 sheaths ending opposite base of second abdominal segment. Leg sheaths comparatively 

 short, ending opposite base of fourth abdominal segment; fore legs a little the longest, middle 

 legs conspicuously shorter than the others. 



Abdominal segments divided into two narrow basal rings and a broad posterior annulus. 

 Armature of abdominal segments weak, posterior ring with a narrow row of small black 

 spines before caudal margin; on basal ring a broad band of microscopic scabrous points 

 arranged in interrupted transverse rows, there being about seven or eight of these rows 

 to a band. Spiracles small but distinct. Female cauda with tergal valves short, but little 

 longer than sternal valves, slightly upturned, ending in short, cylindrical tips; near base 

 with a small, blunt tubercle on either side; dorsum of segment 8 with five rather long, pale 

 lobes, the anterior pair more slender and more widely separated than the posterior pair, which 

 are sometimes closely approximated. 



Neanotype. — Cast pupal skin, Ithaca, New York, October 19, 1915. 

 Paratypes. — Three pupae with type. 



Gonomyia (Gonomyia) kansensis Alex. 



1918 Gonomyia kansensis Alex. Can. Ent., vol. 50, p. 158-160. 



Gonomyia kansensis is a prairie species of the cognatella group and 

 appears to be common along the Arkansas and Kaw Rivers in Kansas. 

 Living pupae were found at Larned on August 1, 1917, in sand along 

 the banks of the Arkansas River, where they were associated with the 

 typical sand-loving fauna, including Gelastocoridae, Saldidae, and Carab- 

 idae (Omophron, Dyschirius, Bembidion, and Tachys). The observation 

 of a small ant preying on a living pupa of this fly is discussed on page 

 729. 



Pupa.- — Length of cast pupal skin, 6 mm. 



Similar to G. alexanderi in mort essentials but showing the following differencea: anten- 

 nal sheaths strongly angulate at -segments; a tubercle on ventral face of antenna at base, and 

 another at inner cephalic margin of eye. 



