260 BENJAMIN P. YOUNG 
Sarcophagidae. Sarcophaga communis, male (Plate XXII, 40), seven abdominal spiracles, 
first and sixth alone in membrane. 
Muscidae. Muscina stabulans, female (Plate XXII, 41), seven abdominal sprue first, 
sixth, and seventh only in membrane. 
Anthomyiidae. Macrorchis ausoba, male (Plate XXII, 42), seven abdominal spiracles, all 
in chitin. 
Chortophila cilicrura, male (Plate XXIII, 43), seven abdominal spiracles, first and 
sixth in membrane. 
Hylephila paludis, female (Plate XXIII, 44), seven abdominal spiracles, first, sixth, 
and seventh in membrane. 
Schoenomyza dorsalis, female (Plate XXIII, 45), apparently only five abdominal 
spiracles, all in chitin. Small species, caudal spiracles may have been overlooked. 
Ophyra leucostoma, male (Plate XXIII, 46), seven abdominal spiracles, first and 
sixth only in membrane. 
Lispa sociabilis, female (Plate XXIII, 47), but five abdominal aaimales first only 
in membrane. 
Limnophora aequifrons, male (Plate XXIII, 48), seven abdominal spiracles, sixth only 
in membrane. 
Eremomyia cylindrica, female (Plate XXIV, 49), seven abdominal spiracles, first only 
in membrane, although last two, which are rather close together, penetrate very light 
chitin. 
Pegomyia affinis, female (Plate XXIV, 50), seven abdominal spiracles, first only in 
membrane, although last two, which are close together, penetrate very light 
chitin. 
Hylemyia lipsia, female (Plate XXIV, 51), seven abdominal spiracles, first only in 
membrane, although sixth and seventh are located very close together in the weak 
chitin of the first telescoped segment of the ovipositor. 
Anthomyia radicum, male (Plate XXIV, 52), seven abdominal spiracles, first and sixth 
in membrane. 
- Hebecnema umbratica, female (Plate XXIV, 538), but five abdominal spiracles found, 
first only in membrane. 
Fannia canicularis, male and female, seven abdominal spiracles, first only in 
membrane. 
Cyclorrhapha — Acalyptratae 
Scatophagidae. Scatophaga stercoraria, male (Plate XXV, 54), seven abdominal  spir- 
acles, first and seventh in membrane. 
Heteroneuridae. Clusia lateralis, female (Plate XXV, 55), seven abdominal spiracles, 
first five in membrane. < 
Helomyzidae. Leria serrata, male (Plate XXV, 56), seven abdominal spiracles, all in 
membrane. 
Borboridae. Borborus equinus, female (Plate XXVI, 57), seven abdominal spiracles, all 
in membrane. 
Sciomyzidae. Dictya wmbrarum, female (Plate X XVI, 58), seven abdominal spiracles, all 
but last two in membrane. 
