DIPTEROUS FAMILY PANTOPHTHALMID^. 591 



inner margin, a short, transverse, silveiy-white streak just in 

 front of each posterior angle of second and third tergites ; apart 

 from silvery-white streaks just mentioned, on both second and 

 third tergites non-shining area is confined to posterior lialf of 

 segment, is of less depth tlian shining ai-ea in front of it, and has 

 its extremities, which are far from reaching lateial margins, 

 tfipored and rounded off; fifth tergite black, moderately shining 

 and narrowly margined (incompletely so in front) with orange- 

 rufous ; remaining tergites blackish-brown or dark brown 

 (terminal lobes or valves ochraceous-buff, sjiaisely clothed with 

 ochraceous-tawny hairs); orange-rufous area of dorsum, as also 

 Mtli tergite, thinly clothed with glistening, decumbent, ochraceous- 

 tawny hair, shining anterior border of second tergite clothed with 

 similar hair, second and following tergites othervv'ise for most 

 part thinly clothed with black hair ; venter black (second and two 

 or three following sternites shining), thinly clothed with black 

 hairs. Wings (apart from cinnamon-buff markings) mummy- 

 brown over rather less than proximal three-fourths of costal 

 border, then lighter or darker sepia-coloured, typical specimen at 

 any rate with a distinctly paler area in centre of certain cells, 

 such as discal and second posterior ; cinnamon-buff" markings 

 more sharply defined and more restricted than in case of several 

 other species of Fantophihalmus already described, chief markings 

 being at base of basal cells (whence extensions are emitted, to 

 costa on humeral transverse vein, and along fifth longitudinal 

 vein), between costa and proximal extremity of discal cell (includ- 

 ing anterior transverse vein and an extension thence for somo 

 distance along third longitudinal vein), and streaks embracing 

 respectively distal extremity of second, and anterior branch of 

 third longitudinal veins, and distal boundaries of second basal and 

 discal cells; costa clove-brown at base, otherwise mainly cinna- 

 mon-brown, veins elsewhere mummy-brown in darker, ochra- 

 ceous-tawny in lighter areas. Halter es : (in dried condition, at 

 any rate) stalks mummy-brown, knobs buff-j^ellow. Legs, except 

 first segment of hind tarsi, uniformly black and clothed with 

 black hair ; first segment of hind tarsi light orange-yellow, 

 clothed with short, ochraceoue-orange hairs, tip of segment 

 blackish-brown or black, clothed with similarly coloured hairs, 

 extreme base of segment also blackish-brown; claws black; 

 pulvilli and empodia ochraceous-buff. 



Panama: Chiriqui Volcano, between 5000 and 9000ft., 1915 

 {ff. J. Watson). 



Owing to its distinctive coloration and markings, Pantoph- 

 thalmtis splendidus — in the $ sex at any rate — cannot be confused 

 with any of its congeners already known. 



The specimen from which the above description has been drawn 

 up beai's, on the fifth and following abdominal segments, a small 

 number of nymphs of the species of Gamasid mite (genus Trachytes) 

 that has been mentioned so often in the course of this paper as 

 occurring on various species of Pantophthalmidse. In addition to 



