234 SUPPLEMENT. 



black pile. Mesonotum bright shining green, with long and abundant yellow pile; a narrow line along 

 the dorso-pleural suture white. Pleurae shining black, with blue and green reflections. Abdomen shining 

 bronze, with violaceous reflections, clothed with pile like that of the mesonotum, the posterior segments 

 with black pile in the middle. Legs light yellow, the distal portion of the hind femora in all the 

 specimens, and the distal part of the hind tibiae in some, black ; distal joints of the tarsi usually brownish. 



Wings nearly hyaline. 

 $ . Front and face of equal width, the former with two shallow longitudinal grooves. Mesonotum with strong 

 violet reflections, the pile shorter and more or less whitish. Abdomen shining brassy, or brassy with 

 violaceous reflections, clothed with shorter white and black pile. Front and middle femora more or less 

 blackish at the distal extremity. Length 9-11 millim. 



3. Chrysochroma latifrons, sp. n. 



$ . Front and posterior orbits bright shining green, the former, from the ocelli to the narrow, narrowly 

 interrupted transverse white band below, as broad as long. Antennae reddish-yellow, blackish at the tip ; 

 first joint very short. Face shining green, in the middle as long as the antennae. Thorax bright metallic- 

 green, with a slender noto-pleural white stripe. Abdomen violaceous ; first four segments each with the 

 posterior angles yellow, the yellow coloration extending across the posterior margin of the second segment. 

 Legs light yellow, the basal portion of the hind femora and the distal joints of the hind tarsi black. 

 Wings nearly hyaline ; the furcation of the second and third veins takes place a considerable distance 

 beyond the anterior cross- vein. Length 4 millim. 



Hob. Mexico, Chilpancingo in Guerrero (H. H. Smith). 



One specimen. I am inclined to think that this species should be referred to the 

 genus Microchrysa. The abdomen is, however, moderately elongate and the eyes bare. 

 It may be distinguished from M. nova, Giglio-Tos, by the yellow bands of the abdomen 

 and the yellow anterior tarsi. 



MEROSARGUS. 

 Merosargus, Loew, Verb, zool.-bot. Ges. Wien, v. p. 141 (1855). 



l. Merosargus stamineus. 



? Scceva staminea, Fabr. Syst. Antl. p. 253 \ 



Sargus stamineus, Wiedem. Aussereur. zweifl. Ins. ii. p. 39 2 ; Walk. List &c. iii. p. 517 s , v. p. 92 4 ; 



Bellardi, Saggio etc. i. p. 44 5 . 

 Merosargus cingulatus, Schiner, Reise der Novara, Dipt. p. 62 6 ; Giglio-Tos, Mem. della Reale 



Accad. delle Sci. di Torino, (2) xliii. p. 114 7 . 



Rah. Mexico {Salle 5 7 ), Orizaba (Sumichrast 7 ), San Lorenzo near Cordova (M. Trujillo), 

 Xucumanatlan in Guerrero, Teapa in Tabasco (R. H. Smith), N. Yucatan (Gaumer). — 

 South America 126 . 



Five specimens. This is certainly the species described by Bellardi 5 under the name 

 of S. (1) stamineus, and I have no doubt as to its identity with Wiedemann's insect. 

 Schiner's description, notwithstanding the darker wings, in all probability applies to it. 

 Fabricius's brief description 1 of Scceva staminea seems to indicate another species. 



M. stamineus was placed by Osten Sacken amongst the unidentified Stratiomyidae 

 (antea, p. 41). 



