450 Mr. T. D. A, Cockerell 



on 



dull ferruginous beneath; lateral inferior margins of clypeus 

 (between eye and apical truncation) yellow ; sides of labrani 

 yellow ; mandibles mainly red, but yellowish basally above ; 

 head broad ; clypeus convex, with large punctures, absent 

 from apical middle ; sides of front broadly and deeply 

 channelled ; eyes dark ; cheeks above smooth and polished, 

 with a sharp posterior margin, below with erect pure white 

 hair ; mesothorax and scutellum duU^ the latter with sparse 

 weak punctures, anterior half of mesothorax with very short 

 reddish-black tomentum ; mesopleura polished, sharply keeled 

 in front, its anterior portion with sparse strong punctures, its 

 posterior part flattened and weakly punctured; tegulse black, 

 marked with dark red. Wings reddish subhyaline (not 

 fuliginous), stigma and outer nervures ferruginous, first and 

 second intercubiti extremely pale; first recurrent nervure 

 joining second submarginal cell not far from end; thorax 

 with white hair beneath, but legs with mainly black hair ; 

 anterior tibise on outer side polished and with large sparse 

 punctures, but middle tibise finely and closely punctured, 

 covered with short very dark reddish hair ; anterior basitarsi 

 with very dark reddish hair, and on outer side a curved keel- 

 like line of erect hairs ; middle basitarsi Avith black hair ; 

 hind tibiae and tarsi with long black hair, except that there is 

 creamy-white hair on anterior margin and posteriorly at apex 

 of tibise, and copiously in front of basitarsi, except at apex. 

 Abdomen broad, shining, pure black, with long glistening 

 white hair beneath, except subapically, where it is dark 

 chocolate. Hind spur simple. 



1 $ , Issororo, N.W.D., June 1915 {Bodkin). 



It was compared with the series in the British Museum 

 and found to be different from all, but it is closely allied to 

 Chalepogenus amplipeimis (Tetraj)edia amplipennis, Smith), 

 from Brazil, differing in the face-markings and paler wings 

 and the hair on the legs. According to Ducke, the 

 Mexican Chalepogenus lugubris (Tetrapedia lugubrif^, Cresson) 

 is identical with amplipennis, and, if this is correct, it has 

 priority. Friese's " group cJypeata '^ must now be divided : 

 clypeata and pyramidalis being true Tetrapedia ; while 

 amplipennis, Sm., bunchosi(E, Fr., glaherrima^ Fr., and nigripes, 

 Fr., all go in Chalepogenus. 



Chalepogenus leucostoma, sp. n. 



^ . — Length about 6*5 mm., anterior wing 6. 



Black, with the labrum, mandibles except apex, area 

 between clypeus and eyes, and extending narrowly up 

 oibits to level of antennee, all white ; clypeus also with 



