622 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 57. 



capsule with length to width as 5:4. Chitinous parts shiny. Head 

 capsule Indian red ; mandibles dark brown ; prothoracic shield brown 

 ocher, posteriorly with two sepia brown spots; Meso- and meta- 

 thoracic plate, basal plate of cerci sepia brown ; remainder of chitin- 

 ized parts brown ocher to pale brown ; membranous parts vermilion 

 red. Setae pale yellow. Mandible with two setae. Spiracles very 

 small, the mesothoracic spiracles somewhat larger than the abdominal 

 ones; peritrema and finger-shaped tubes slightly chitinized. 



Subfamily E (pp. 622-624). 



Frons posteriorly limited by a transversal line. Epicranial suture 

 not developed. Second antennal joint small, considerably shorter 

 than both basal and apical antennal joints. Ventral mouthparts 

 slightly retracted. Gula with plain surface. Preeusternal and 

 Eusternal areas not separated. Spiracles bifore. Ocelli, five on each 

 side. 



15. Genus HYDNOCERA Newman. 



Body short, digitif orm or oval, somewhat flattened ; ninth abdomi- 

 nal segment semioval or semicircular. Chitinous parts well devel- 

 oped. Membranous parts unicolorous or variegated. Setae numer- 

 ous, scattered. Head capsule trapezoidal, posteriorly wider than 

 anteriorly; somewhat wider than long. Frons smooth. Epicranium 

 smooth. Ocelli five, anterior row bent slightly forwards. Length of 

 basal, second and apical antennal joints proportioned as 3 : 1 : 3 ; sup- 

 plementary joint twice as long as second joint. Mandible about half 

 as long as frontal suture, length to width about as 6 : 5 ; pointed; apex 

 somewhat retracted behind inner corner of mandibular base; pos- 

 terior half of inner margin convex; retinaculum hardly developed; 

 tooth behind apex low and blunt; with a single mandibular seta. 

 Length of maxilla from end of palpus to posterior corner of cardo in 

 proportion to gula about as 1:2; posterior parts of cardo and stipes 

 without special chitinizations ; maxillary palpus with small apical 

 joint; length of basal, second and apical joints of maxillary palpus 

 proportioned as 3:5:1; palpiger with plate-shaped chitinization. 

 Gula about same length as frontal suture. Basal and apical joints of 

 labial palpus proportioned about as 1 : 3. Prothoracic tergal shield 

 well developed, along middle line about as long as frontal suture; 

 prothoracic sternal plate large, subtriangular, anteriorly fused with 

 the presternal chitinizations; posteriorly pointed. Legs well devel- 

 oped. Abdomen with normally developed intersegmental mem- 

 branes; dorsal ampullae absent, but substituted by very small dorsal 

 plates. Ninth abdominal segment dorsally slightly chitinized. Cerci 

 absent. Spiracles small; the two spiracular tubes short and about 

 circular. 



