\begin{table}%t4
\caption{\label{table:4}IRAS post-AGB star and PN candidates without 2MASS near-IR counterparts.}
%%\centering

\small          
\begin{tabular}{l|l|l|l|l|l} 
\hline\hline       
IRAS~08351$-$4634 & IRAS~15531$-$5704 & IRAS~17158$-$4049 & IRAS~17543$-$3102 & IRAS~18135$-$1456 & IRAS~19011$+$1049 \\
IRAS~09370$-$4826 & IRAS~16245$-$3859 & IRAS~17168$-$3736 & IRAS~17550$-$2120 & IRAS~18246$-$1032 & IRAS~19013$+$0629 \\
IRAS~10194$-$5625 & IRAS~16518$-$3425 & IRAS~17382$-$2531 & IRAS~17552$-$2030 & IRAS~18385$+$1350 & IRAS~19190$+$1102 \\
IRAS~11444$-$6150 & IRAS~16558$-$3417 & IRAS~17385$-$2413 & IRAS~18011$-$1847 & IRAS~18514$+$0019 & IRAS~19315$+$2235 \\
IRAS~11549$-$6225 & IRAS~17067$-$3759 & IRAS~17393$-$2727 & IRAS~18016$-$2743 & IRAS~18529$+$0210 & IRAS~19454$+$2920 \\
IRAS~13404$-$6059 & IRAS~17088$-$4221 & IRAS~17404$-$2713 & IRAS~18039$-$1903 & IRAS~18580$+$0818 & IRAS~20042$+$3259 \\
IRAS~13500$-$6106 & IRAS~17097$-$3624 & IRAS~17443$-$2949 & IRAS~18051$-$2415 & IRAS~18596$+$0315 & IRAS~21537$+$6435 \\
IRAS~15284$-$6026 & IRAS~17153$-$3814 & IRAS~17482$-$2501 & IRAS~18083$-$2155 &                    &                    \\
\hline
\end{tabular}
\end{table}