THE CRANE-FLIES OF NEW YORK PART II 795 



20. Mental plates not completely divided; abdominal segments with basal creeping-welts 

 on both ventral and dorsal surface; spiracular disk indistinctly four- or five-lobed. 



Limnobiini (p. 795) 



Mental plates completely divided; abdominal segments without welts; spiracular disk 

 obliquely truncated Eriopterini (p. 908) 



Pupae 



1. Pronotal breathing horns eight-branched; forms entirely aquatic. 



Limnobiini, sub tribe Antocharia (p. 799) 

 Pronotal breathing horns simple, unbranched 2 



2. Rostral sheath elongated; lives in wood. .Eriopterini, subtribe Elephantomyaria (p. 952) 

 Rostral sheath not elongated 3 



3. Pronotal breathing horns very minute, conical, visible only with a lens. 6 



Limnobiini, subtribe Dicranoptycharia (p. 828) 

 Pronotal breathing horns larger, not microscopic 4 



4. Dorsal spiracles on eighth abdominal segment large and functional 5 



Dorsal spiracles on eighth abdominal segment small or lacking 7 



5. A large circular spinous area on abdominal pleurites; cephalic crest chitinized, acutely 



pointed; pronotal breathing horns directed ventrad; lives in decaying wood. 



Hexatomini, subtribe Epiphragmaria (p. 843) 

 Not as above 6 



6. Pronotal breathing horns large, flattened, the tips yellow; abdominal tergites with 



shagreened crossbands Hexatomini, subtribe Ularia (p. 838) 



Pronotal breathing horns slender, cylindrical; abdominal tergites with tran verse rows of 

 small spines Limnobiini, subtribe Rhamphidaria (p. 830) 



7. Abdominal pleurites with circular areas set with numerous microscopic spicules; pronotal 



breathing horns short, usually truncated at tips, which are margined with the breathing 



pores Pediciini (p. 894) 



Abdominal pleurites not as above, if with spines these large and few in number; pronotal 

 breathing horns long, cylindrical 8 



8. Abdominal segments with broad transverse bands or welts on basal rings of third to 



seventh tergites Limnobiini (p. 795) 



Abdominal segments with basal ring unarmed as above, posterior ring before margin 

 with a transverse row of spines or stiff setae 9 



9. A distinct crest on mesonotal prescutum armed with tubercles, spines, or setae; size 



small (usually under 9 mm.) Eriopterini (p. 908) 



No distinct crest on mesonotal prescutum (scutellum armed in some Eriocera); size 

 large (usually over 10 mm.) 10 



10. Leg sheaths very short, barely exceeding wings; lives under bark. 



Eriopterini, genus Gnophomyia (p. 934) 

 Leg sheaths longer, extending one or more segments beyond tips of wings 11 



11. Size small (under 6 mm.); abdominal armature weak, lacking on segment 7. 



Pediciini, subtribe Adelphomyaria (p. 895) 



Size larger; abdominal armature stronger, spinous; if small in size (Dicranophragma), 

 basal annuli of abdominal segments armed with naked tubercles . . Hexatomini (p. 835) 



Tribe Limnobiini 



A large group of crane-flies, arranged in a few often extensive genera, 

 comprise the tribe Limnobiini. At first sight the tribe appears to be a 



5 In the genus Cladura (Eriopterini), reared while this paper was going thru the press, the breathing 

 pores are likewise microscopic, being entirely sessile (page 949). 



