CARROLLIA IRIDESCENS 463 



Azas Algumas escamas lateraes estreitas, em forma das de culex, sendo, porem, 

 na maior parte obovaes como as de taeniorhynchus; as escamas no apex sao muito 

 aconchegadas, lembrando as azas de melanoconion; primeira cellula forqueada, 4 

 vezes mais comprida que o pedunculo correspondente; a segunda, quasi igual ao 

 pedunculo; as veias a e & formam um angulo obtuso, aberto para a base da qual c se 

 approxima por mais de 2 vezes o seu comprimento; as escamas na costa e na primeira 

 veia longitudinal, como tambem a maior parte da S-; nervura, sao mais escuras e tern 

 reflexo de bronze; as outras sao cinzentas; as escamas compridas da margen das azas 

 sao mais escuras no apex, tornando-se gradualmente mais claras na direcgao da base. 



A femea se distingue pelas antennas menos plumosas, os palpos mais curtos, as 

 unhas iguaes e pelos caracteres sexuaes. 



NoTA. A descripgao e feita de exemplares criados de larvas encontradas em agua 

 de taquara na serra da Cantareira, perto de S. Paulo. 



E' uma especie muito bonita e caracteristica. 



Description of Female, Male, and Laeva of Careollia ikidescens : 



Female. Proboscis slender, long, slightly swollen at tip, the labellse con- 

 ically tapered ; vestitiire black with a blue reflection, setas rather coarse, longer 

 than usual, black, sparse. Palpi slender, one-fifth as long as proboscis, black. 

 Antennae moderate, joints subequal, rugose, coarsely pilose, black; hairs of 

 whorls moderate, sparse, black; tori subspherical, with a cup-shaped apical 

 excavation, luteous brown, silvery-blue pruinose. Clypeus rounded triangular, 

 blackish bro-Roi, nude. Eyes black. Occiput densely clothed with broad, flat, 

 subtruncate appressed scales, even on vertex, pale bronzy brown with an 

 iridescent reflection, and short, erect, brown forked scales with a golden reflec- 

 tion, broader and very dense on the nape; a pair of coarse brown bristles pro- 

 jecting between eyes. 



Pro thoracic lobes elliptical, remote dorsally, clothed with dark-brown scales 

 and black bristles. Mesonotum black, densely clothed with narrow, curved 

 bronzy-brown scales roughened by broader, intermixed suberect ones and coarse 

 pale ones around the ante-scutellar space. Scutellum trilobate, clothed with 

 brownish yellow scales similar to those on mesonotum, each lobe with a group of 

 dark bristles. Postnotum elliptical, prominent, dark brown, nude. Pleurae 

 deep black on upper half, coxae and their insertions pale luteous, a strong pearly 

 violaceous reflection above, leaving an oblique median black bar, elliptical 

 yellowish-silvery scales on coxge and pleurge below, and rows of dark bristles. 



Abdomen compressed, somewhat expanded apically, truncate at tip; dorsal 

 vestiture deep black, segments with narrow basal yellowish-white bands, nar- 

 rowly separated at sides from a row of large lateral, basal, segmental, rounded 

 triangular, grayish-white patches which have a silvery-violet reflection in cer- 

 tain lights; first segment with a large patch of black scales and with fine 

 hairs ; venter yellowish-silvery scaled, tips of last three segments black scaled, 

 roughened ; apex of abdomen broad, bristly. 



Wings rather narrow, hyaline ; petiole of second marginal cell one-fourth as 

 long as its cell, that of second posterior cell nearly as long as its cell ; basal cross- 

 vein distant more than its own length from anterior cross- vein ; scales of veins 

 dense, moderately long, elliptical, intermixed with some long ligulate ones, 

 especially on fifth vein, dull brown, with a blue reflection on the costa. Halteres 

 with whitish stems and black knobs. 



Legs moderate, black scaled with bronzy reflection ; femora yellowish white at 

 base and beneath to near apices, a pair of large spots on outer side of mid and 

 hind femora white with a violet reflection, one near middle, the other towards 

 apex; knees narrowly whitish scaled; tibiae with scales somewhat roughened, 

 hind pair with a pale line on inner side ; tarsi with a bronzy reflection beneath. 

 Claw formula, 0.0-0.0-0.0. 



Length: Body about 3.5 mm.; wing 3.5 mm. 



