The Crane-Flies of New York — Part II 977 



The following keys separate the genera of the subfamily Tipulinae: 



Larvae 



1. Spiracular disk surrounded by five lobes; living in moss Dnlichopeza Curt. (p. 981) 



Spiracular disk surrounded by four or six lobes, or with lobes indistinct 2 



2. Spiracular disk with lobes indistinct; living in nearly solid or semi-decayed wood. 



Tanyplera Latr. (p. 988) 

 Spiracular disk with lobes distinct 3 



3. Spiracular disk with four slender, hornlike lobes Tipula {selene Meig.) (p. 1016) 



Spiracular disk with six lobes 4 



4. Anal gills pinnately branched Longurio Loew (p. 990) 



Aeshnasoma Johns, (p. 993) 

 Anal gills not pinnately branched 5 



5. Antepenultimate segment of abdomen with a strong lateral tubercle. 



Oropeza Needm. (p. 982) 

 Antepenultimate segment of abdomen without such a tubercle 6 



6. Dorsum of head behind antemia with a slender, fle.xible spine; living in wood. 



Clenophora (apicata O. S.) (p. 986) 

 Dorsum of head without such a spine 7 



7. Lobes surrounding spiracular disk elongate, digitiform, fringed with long hairs. 



Prionocera Loew (p- 995) 

 Lobes surrounding spiracular disk less elongate 8 



8. Size large (over 50 mm.); spiracular disk with the six moderately long lobes fringed with 



long hairs; mandible small, with a dorsal and a ventral tooth; found in western North 



America Holorusia Loew (^p. 993) 



Size smaller; if large {T. abdominalis) , the lobes surrounding disk bifid; mandible with 



two or three ventral teeth Tipula Linn. (p. 998) 



Nephrotoma Meig. (p. 1016) 

 Pupae ■ 



1. Pronotal breathing horns very long, slender, the longest one nearly if not quite half length 



of body 2 



Pronotal breathing horns short, cyhndrical or flattened, subequal in size 3 



2. Length 40 mm.; kmgest breathing horn 18 mm.; ma.xillary palpi not recurved at tips; 



venation with petiole of cell Mi very short Longurio Loew (p. 990) 



Length 20 mm.; longest breathing horn 9 to 10 mm.; maxillary palpi recurved at tips; 

 venation with petiole of cell Mi longer Prionocera Loew (p. 995) 



3. Pronotal breathing horns short, compressed, deeply bicrenulated; living in wood. 



Tanyplera Latr. (p. 998) 

 Pronotal breathing horns cylindrical 4 



4. Maxillary palpi not recurved at tips 5 



Maxillary palpi recurved at tipy 6 



5. Pronotal breathing horns with apices deeply split; mesonotum with two tubercles; 



abdominal segments with fourteen to thirty-four spines; found in Western States; 



living in mud Holorusia Loew (p. 993) 



Pronotal breathing horns short, slender, apices not split; mesonotum with eight tubercles; 

 abdominal segments with four powerful spines near posterior margin; found in Southern 

 States; living in wood Brackypremna O. S. (p. 984) 



6. Mesonotum with two spines; ventral abdominal spines six to eight; fore and middle tarsi 



subequal, shorter than hind tarsi; living in wood Clenophora Meig. (p. 986) 



Characters not as above 7 



7. Mesonotum with a large, roughly triangular, reticulated area on either side of median 



line; dorsum of cauda with four lobes Oropeza Needm. (p. 982) 



Mesonotum unarmed or with four or six lobes; dorsum of cauda with six, or rarely four, 



lobes Tipula Linn. (p. 998) ' 



Nephrotoma Meig. (p. 1016) 



10 



