608 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 57. 



5. Genus CHARIESSA Perty. 



Body robust, elongate digitiform with median abdominal seg- 

 ments somewhat wider than the preceding and succeeding seg- 

 ments. Chitinoiis parts moderately developed with light brown 

 color prevalent. Membranous parts with pale bluish tinge where 

 exposed; otherwise whitish. Head subtriangular, twice as wide 

 as long. Frons slightly sculptured. Epicranium smooth above and 

 below. Ocelli arranged in two subparallel, upv/ard and back- 

 ward directed rows; anterior row with three, posterior with two 

 ocelli; all ocelli approximately of same size, slightly larger than 

 basal cups of setae; lower posterior ocellus a trifle above upper an- 

 terior ocellus. Length of basal, second and apical antennal joints 

 proportioned as 3:1:1; supplementary joint very small. Mandible 

 with a tooth present between retinaculum and apex.^ Maxilla well 

 developed, its extreme length in proportion to the length of gula 

 as 4: 5. Length of basal, second and apical joints of maxillary pal- 

 pus proportioned as 2:1:1; palpiger with well-developed plate. 

 Submentum and mentum without or with very thin chitinization. 

 Stipes labii chitinized; basal and apical joints of labial palpus 

 proportioned as 1 : 1. Prothorax subrectangular, not much longer 

 than the following segment, twice as wide as long. Prothoracic 

 tergal shield, with length to width as 1 : 2, along middle line about as 

 long as frontal suture; prothoracic sternal plate about as wide as 

 the distance between the attachments of the front legs. Legs of 

 medium size. Abdomen with normally developed intersegmental 

 membranes, second to seventh abdominal segments with dorsal am- 

 pullae; postscutellar areas well developed; sternellar areas normal. 

 Ninth abdominal segment conical, considerably longer than half 

 its extreme width. Basal plate of cerci conical, thinly chitinized, 

 anteriorly not defined, laterally rectilinear. Cerci medium sized, 

 hookshaped. 



CHARIESSA PILOSA Forster. 



Hopkins IT. S^ No. 11870i^; mature. Species reared ; cast skiu and imago preserved. 

 (Figs. 5, 20, 33. 53, 70, 88, 89, 112.) 



Total length of body, about 21 mm.; extreme width, 4 mm.; ex- 

 treme thickness, 3^ mm. ; anterior width of prothorax, 3 mm. Man- 

 dibles, epistoma, median endocarina of frons and the cerci blackish 

 brown; remainder of frons and anterior part of epistoma slightly 

 lighter, remainder of head capsule brown ocher; prothoracic shield 

 delicately chitinized and pale clay yellow ; ^ the other delicately 

 chitinized parts also pale clay yellow ; membranous parts lilac where 

 exposed, otherwise whitish. Setae thin, light yellow, of nonnal 



* In specimens near pupal stage the apex, tooth and retinaculum are often very blunt. 



2 In half-grown specimens corneous and brown ocher. 



