I - APIDJC. 



rutb-tostucc'ous l)oiio;illi, tlio femora dilalcd, the apex of tlic tibiuc 

 Icslacooiis altove; tlie tarsi pale testaceous, dilated, witli flic first 

 and second joints produced into large projecting lobes, the Hrst 

 having a longitudinal fuscous stripe, all the joints fringed behind 

 wilh U)ng wliite pubescence, -which is edged narrowly with fuscous; 

 the 00X03 armed with black spines ; the intermediate femora are 

 tlilated, and, as well as the tibia", rufo-jjiceous beneath ; the tarsi 

 rufo-testaceous, with the tips of the joints rufo-fuscous ; the ])os- 

 terior femora broadly dilated and the tibioe curved, the tarsi rufo- 

 piccous ; the fenaora nif()-])iceous beneath. Abdomen shining, t he 

 margins of the segments thinly fringed with cinereous pubescence ; 

 the apical margin of the terminal segment slightly notched in the 

 middle. 



Hub. St. Paulo, on the Amazons. 



32. MegacMle compacta. 



Fenude. Length 6 lines. — I31ack ; the thorax above clothed with 

 fulvous pubescence. The face with short cinereous pubescence at 

 the sides of the clypcus ; above the insertion of the antenna) it is 

 fulvous ; the llagellum fulvous beneath. The wings fulvo-hyaline, 

 the nervures and tegula) ferruginous ; all the tarsi with bright ful- 

 vous pubescence beneath. Abdomen shining and very finely punc- 

 tured ; the apical margins of the segments with pale fulvous fascia3, 

 usually more or less interrupted in the midtUe ; the apical segment 

 with erect black hairs ; clothed beneath with changeable yellowish- 

 whilo pubescence. 



JIab. Santarem. 



This is probably the female of 31. hilaris. 



33. MegacMle hilaris. 



Alale. Length 6 lines.— Black ; the legs ferruginous, the anterior 

 tarsi dilated, and the abdomen with pale fascia). The face with 

 bright pale golden pubescence, that on the vertex and disk of the 

 thorax fulvous, that on the cheeks and thorax beneath white ; the 

 Hagcllum fiilvous beneath. The metathorax with pale pubescence ; 

 the intermediate and posterior legs rufo-piceous, darkest above, 

 their tarsi pale rufo-testaceous ; the anterior tarsi yellowish ; the 

 dilated joints with a thick fringe of white pubescence, which is 

 fulvous beneath ; the other tarsi with a thin white fringe ; the 

 anterior coxa) with stout blunt spines ; wings hyaline, wath a fus- 

 cous cloud on their apical margins ; the nervures ferruginous, the 

 tegula) rufo-testaceous. Abdomen very finely and closely punc- 

 tured ; the basal segment with pale fulvous pubescence, the apical 

 margins of the segments with pale fascia) ; the fifth segment with 

 very short pale puliescence at its base and with black beyond, the 

 entire segment sprinkled with lung black hairs ; the sixth segment 



