102 Mr. B. F. Cummings on 



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

 phaga known from a Clirysotis'xB Nirmus liguJatuSj Neumann, 

 from G. brasiliensis (Bull. Soc. Hist. Nat. Toulouse, 1890, 

 xxiv. p. 60, " Contribution a Fdtude des oiseaux de la 

 faniille des Psittacidse"). 



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

 front of the antenna on each side is a large process, slightly 

 curved, running downwards and backwards beneath the base 

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

 The firm circular margin of the temples, the occipital line, 

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

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

 ments of the antenna 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* apparently absent. Meso-f- metathorax 

 broadens out upon the abdomen, the sides being divergent. 



Abdomen small, rather short ; broadest at the sixth 

 segment. Pale or whitish. 



External Form. Female. — Head and thorax as in the ^ . 

 Abdomen more regularly ovate, especially noticeable at the 

 end of the abdomen, where the terminal segments maintain a 

 tirm unbroken curve, unbroken as in the ^ 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 pale brown in colour. 

 Gronopods small, represented by twodehcate lobes. A rather 

 lung, almost })arallel-sided genital plate, semitransparent or 

 whitish. . Posterior margin straight, transverse, and fringed 

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

 the sixth segment, a small brown chitinous patch. 



Chcetotaxy. Male. — Head : along the 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 hairs. At about 

 the level of the postaxial margin of the antenna on the dorsal 

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

 Around the temple margin four hairs, well -spaced, the first 

 three short, the fourth very long. Along the occipital line 

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

 fairly long hairs on preantennal area behind the anterior 

 margin. 



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



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

 to signify tbe two endoslveletal rods in many Mallophtii^a which rim 

 from the " shoulder " of the pronotum down to the presternum. 



