THE CRANE-FLIES OF NEW YORK PART II 901 



of same side; anterior margin of each half with three slender, flattened teeth, the middle one 

 of which is slightly the shortest. Hypopharynx conspicuous, labriform; anterior margin with 

 a deep notch to form distinct lobes at lateral angles, and with several rows of small chitinized 

 tubercles. Antenna (Plate LXI, 313) small; basal segment elongated, slightly curved, a 

 circular auditory plate near base, at tip with numerous papillae, two of which are very long, 

 nearly as long as segment itself; in addition to these, three or four tiny cylindrical papillae. 

 Mandible powerful; ventral cutting edge with a row of about four teeth which are succes- 

 sively enlarged from tip to bass; basal tooth very broad and flat, with outer margin truncate 

 or slightly concave; teeth on dorsal- cutting edge indistinct; a pencil of moderately delicate 

 setae on scrobal region of mandible, and another at prosthecal region. Maxilla elongate; 

 outer lobe larger than inner lobe, chitinized, apex with a very flat circular palpus (Plate 

 LXI, 314) which is provided with a few disklike papillae around margin and a few scattered 

 sensory papillae over pale apex; inner lobe with a long, powerful seta on ventral face and 

 smaller setae near tip. 



Nepionotype. Ithaca, New York, June 1, 1917. 

 Paratypes. Larvae from type locality. 



Genus Rhaphidolabina Alexander (Gr. diminutive of Rhaphidolabisfy 

 1016 friaphiMabina Alex. Proc. Acad. Kit. Sci. Phih., p. 540-541. 



Larva. Body covered with an abundant, appressed pubescence and tufts of erect hairs 

 which are more numerous on anterior end of body. Creeping-welts on dorsal and ventral 

 surfaces of abdominal segments 4 to 7. Spiracular lobes two, moderately elongated, each 

 with about six hairs at tip. Spiracles large. Anal gills four, long and diaphanous. Head 

 capsule long and massive. Mandible powerful. Antenna short, with two elongate papillae. 

 Hypopharynx labriform, anterior margin concave. Mentum completely divided, each half 

 with three large teeth and a much smaller lateral tooth. 



Pupa. Labrum truncate. Pronotal breathing horns short-cylindrical or slightly flattened. 

 Abdominal segments with circular areas of spicules on pleurites. Intermediate tergites with 

 a broad transverse band of tiny spines. 



The genus Rhaphidolabina includes only R. flaveola, a curious pallid 

 fly of the northeastern United States, serving as a connecting link between 

 Tricyphona on the one hand and the Dicranotae on the other. The 

 adult flies are common on rank vegetation in cold woods. The immature 

 stages are spent in rich organic earth in the same situations as are fre- 

 quented by the adult flies. 



Rhaphidolabina flaveola (O. S.) 



1869 Rhaphidolabis flaveola 0. S. Mon. Dipt. N. Amer., part 4, p. 288. 

 The writer has found the larvae of Rhaphidolabina flaveola in Maine 

 and in New York. At Orono, Maine, larvae were numerous in the rich 



