Genus Megarliinus. 137 



scales, pale blue at their base, apple green apically, across the 

 back of the mesonotmn shorter flat scales mostly brilliant coppery- 

 reel, blue, green and mauve. 



Scutellum with dense flat deep golden scales in the middle, 

 longer pale blue and apple green ones at the sides ; chaetae 

 black ; metanotum brown ; prothoracic lobes with purple, azure- 

 blue and golden flat scales (the whole having a mauve tint under 

 a hand lens) ; pleurae densely white scaled. 



Abdomen entirely deep metallic violet with small basal white 

 lateral patches, caudal fan blackish-brown, the hairs on the sixth 

 segment pale 



Legs deep metallic violet with bronzy reflections. 



Wings with the first submarginal cell small, about two-thirds 

 the length of the second posterior, its stem about three and a half 

 times the length of the cell, stem of the second posterior about one 



Fig. 39. 

 Wing of Megarliinus chrysocephala. n. sp. <?. 



and three-fourths the length of the cell; supernumerary cross- 

 vein small, about six times its own length in front of the mid, the 

 long backwardly projecting posterior cross- vein meets the mid. 



Halter es pale creamy. 



Length. — 8*5 mm. 



Habitat. — Sao Paulo, Brazil (Dr. Lutz). 



Time of capture. — August. 



Observations. — Described from a $ given me by Lutz under 

 the name solstitialis. It differs considerably from that species, 

 firstly in the head being deep burnished golden yellow, secondly 

 in the white spots on the palpi, thirdly in the marked scutellar 

 adornment, fourthly in the absence of the green basal abdominal 

 segment, and fifthly in the venation. The legs in the specimen 

 were damaged. For beautiful coloration this species vies with 

 all the others. 



