102 Mr. B. F. Cumniiiii;s 07i 



So far as I am aware, the only otlier member of the Mallo- 



pliaga known from a Cliri/sot/s is Nirnnts Ii(pilatus, Neumann, 



from C. IrnsHirti.sis (Hull. Sue. Hist. Nat, Toulouse, 1890, 



'xxiv. p. GO, "Contribution a rc'tudo des oiseaux de la 



famille des Psittacidaj '^). 



External Form. Male (fig. 5). — Head : pale in colour; in 

 front of the antenna on each side is a large |)rocess, slightly 

 curved, running downwards and backwards beneath the base 

 of eacii antenna. Each process has a brown-coloured tip. 

 The firm circular margin of tiie temples, the occijjital line, 

 and the two incrassations — one in front of each antenna — are 

 notable characteristics. On each of the third and filth seg- 

 ments of the anteiuia there is a minute hair, probably of a 

 sensory nature, set in a large alveolus. 



Prothorax much narrower than the head, short, parallel- 

 sided. Clavicles* ap])arently absent. Meso+ metathorax 

 broadens out upon the abdomen, the sides being divergent. 



Abdomen small, rather short ; broadest at the sixth 

 segment. Pale or whitish. 



Ejcternal Form. Female. — Head and thorax as in the (J. 

 Abdomen more regularly ovate, especially noticeable at the 

 end of the abdomen, where the terminal segments maintain a 

 firm unbroken curve, unbroken as in the J" by the somewhat 

 sudden narrowing of the last segment. On each segment in 

 the pleural region are two tergites, one on each side, leaving 

 an uncovered median area. Tergites j)ale brown in colour. 

 Gonopods small, represented by two delicate lobes. A rather 

 long, almost parallel-sided genital plate, semitiansparent or 

 whitish. Posterior margin straight, transverse, and fringed 

 with hairs. On each side of the jdate, at about the level of 

 the sixth segment, a small brown chitinous patch. 



Chcetota.iy. Male. — Head : along tiie frontal margin 

 between the two incrassations four well-spaced hairs, the two 

 middle ones short. Behind these, and between them and the 

 mandibles on the dorsal surface two longer liairs. At about 

 the level of the postaxial margin of the antenna on the dor.'sal 

 surface, a short bristle, one on each side near the margin. 

 Around the temjde margin four hairs, well-.;i)aced, the first 

 three short, the fourth veiy long. Along the occij)ital line 

 eeveral short hairs. On the ventral surface, four well-spaced 

 fairl}' long hairs on preanteunal area behind the anterior 

 margin. 



Tliorax : on the posterior lateral angle of the pronotum, a 



* " Clavicle " ie a term 1 borrowed in 1913 from vertebrate anatomy 

 to signify the two endoskeletal rods in many Malluphaga which run 

 from the "shoulder" of the pronotum duwu to the prosteruum. 



