196 The Philippine Journal of Science i9i6 



are later discovered in the Philippines, they certainly are not 

 as common as in Java. The species known also from Java are 

 such as are also known from Celebes, or generally distributed in 

 Malasia. There is nothing to indicate any relation to the true 

 Australian fauna; in fact, nearly all the genera are well known 

 in India or southeastern Asia. There is no trace of the genera 

 that ally India and Ceylon to Africa. Many of the psocid genera 

 are known also from Borneo. 



Key to the orders. 



a?. Wings with a nodus, or strong cross vein near middle of costa, inter- 

 rupting the venation; wings densely net- veined; no palpi, antennas 



very small Odonata. 



a^ No nodus present. 

 ¥. Tarsi five-jointed. 



&. Hind wings with a folded anal area; antennae never capitate, 

 d'. Mandibles and maxillse imperfect; wings with few cross veins; 



pronotum small; wings plainly hairy Trichoptera. 



d^ Mandibles and maxillae developed ; wings not hairy and vdth many 



cross veins; pronotum prominent Megaloptera. 



c'. Hind wings without a folded anal area; wings not noticeably hairy; 

 mouth parts well developed. 

 e\ Head prolonged in beak beneath; pronotum small; wings with few 



cross veins Mecoptera. 



e\ Head not so prolonged; pronotum distinct; usually many cross 



veins in wings Neuroptera. 



6'. Tarsi with fewer than five joints. 

 f. Antennae minute; abdomen with long terminal setae; fore wings 



much larger than hind wings Anisoptera. 



f. Antennae long. 



fif\ Tarsi with four joints; only costal venation distinct, setae very 



short Isoptera. 



5'^ Tarsi two- or three- jointed ; venation developed all over wing. 

 h^. No terminal setae; pronotum small; wings with few veins; no 



folded anal area to hind wings Corrodentia. 



/^^ With terminal setae to abdomen; pronotum distinct; a folded 

 anal area to hind wings Plecoptera. 



ISOPTERA 



Key to the families. 



a'. Tarsi of three joints, basal joint of front tarsi swollen; pronotum with 

 a transverse suture Embidae. 



a'. Tarsi of four joints, basal joint not swollen; no transverse suture to 

 pronotum Termitidse. 



TERMITID^ 



Several species of white ants have been recorded from the 

 Islands, and doubtless twenty or thirty occur; the only one re- 

 ceived is a large dark-winged male Termes. Six new species 



