34 MISC. PUBLICATION 42 4, U. S. DEPT. OF AGRICULTURE 



Key to Larvae — Continued 



One pair of setae near antennae (between antennae and mouth 

 parts) ; largest dorsal 8-shaped pores at least as large 

 as marginal pores of same segment 100 



100. About 2 dorsal submedian 8-shaped pores on each half of body, 



the anterior pore smaller than the posterior 



minusculum, new species, p. 133. 

 About 5 dorsal lateral 8-shaped pores on each half of body, the 

 anterior pore larger than the posterior 



parvum, new species, p. 148. 



101. (93) Anterior spiracle with 2 pores, posterior with 2 102 



Anterior spiracle with 1 pore, posterior with 2 110 



102. Anal ring with 6 or with 14-20 pores 103 



Anal ring without pores 106 



103. Axes of the posterior 6 pairs of marginal 8-shaped pores trans- 



verse to body margin : first and fifth antennal segments 

 without setae ; femur and tarsus each with 2 setae. Not 



found on Bambuseae subventruosum, new species, p. 202. 



Axes of the posterior 6 pairs of marginal 8-shaped pores slightly 

 diagonal or longitudinal to body margin ; either the first or 

 fifth antennal segment with 1 seta : femur and tarsus each 

 with 3 setae. Found only on Bambuseae 104 



104. Anal ring with 6 pores : some marginal 8-shaped pores no 



longer than width of others sparus, new species, p. 193. 



Anal ring with 14 or 18 pores ; no marginal 8-shaped pores as 



short as the width of others 105 



105. Fifth antennal segment with 1 seta ; about 7 dorsal 8-shaped 



pores bambusicola Kuwana,p. 49. 



Fifth antennal segment without setae ; about 22 dorsal 8-shaped 

 pores hemisphaericum Kuwana. p. 104. 



106. (102) Marginal 8-shaped pores 22 in number, of unusual shape, with 



halves closely appressed, nearly as wide as long, axes of 

 all diagonal or transverse to body margin 



gutta Green, p. 101. 



Marginal 8-shaped pores 26 or 28 in number, not shaped as 



above, longer than wide, axes of all longitudinal, or axes 



of the posterior 6 pairs transverse and axes of the other 



pores longitudinal to body margin 107 



107. Fifth antennal segment with 1 seta : dorsal 8-shaped pores 



arranged in a submedian and a lateral row on each half 

 of body. Not occurring on Bambuseae 



lacrimula, new species, p. 117. 

 Fifth antennal segment without setae ; dorsal 8-shaped pores 

 arranged either in a submedian or in a lateral row on 

 each half of body. Occurring only on Bambuseae 108 



108. Axes of the posterior 6 pairs of marginal 8-shaped pores 



transverse to body margin, axes of others longitudinal 



ordinarium, new species, p. 144. 

 Axes of all marginal 8-shaped pores longitudinal to body 



margin* 109 



109. First antennal segment with 2 setae : 11-20 dorsal 8-shaped 



pores ; apical setae about 36 ,u long 



gemmae, new species, p. 97. 

 First antennal segment with 1 seta ; 9-12 dorsal 8-shaped pores ; 

 apical setae about 52 n long 



longulum, new species, p. 121. 



110. (101) Anal ring without pores 111 



Anal ring with at least 2 pores, usually with 8 or more 112 



111. First antennal segment with 1 seta ; 7-10 dorsal 8-shaped pores, 



varying in size, the largest slightly smaller than posterior 



marginal 8-shaped pores minutum Takahashi, p. 135. 



First antennal segment with 2 setae ; 13-15 dorsal 8-shaped 

 pores, uniform in size, about one-half the size of posterior 

 marginal 8-shaped pores circulare, new species, p. 66. 



112. (110) Without dorsal 8-shaped pores 113 



With at least 2 dorsal 8-shaped pores, usually with at least 9__ 114 



