10 DIPTERA. 



by the yellow lines described above ; I do not see that they are interrupted in the 

 middle. 



ERIOCERA. 



Eriocera, Macquart, Dipt. Exot.-4 1, p. 74 (1838) ; O. Sacken, Proc. Acad. Phil. 1859, p. 243 j 

 Monogr. &c. iv. p. 244. 



Analytical Table of the Eriocerae fr om Mexico and Central America. 



Wings unicolorous (without differently coloured bands or spots). 

 Abdomen yellow, with a black band before the tip. 



Head black 1. mesowantha, sp. n. 



Head yellow 2. zonata, sp. n. 



Prevailing colour of the abdomen black. 

 Thorax red above. 



Frontal tubercle red ; scutellum black 3. hcemorrhoa, sp. n. 



Frontal tubercle black ; scutellum red 4. erythrcea, sp. n. 



Thorax black. 



Frontal tubercle red 5. gracilis, sp. n. 



Frontal tubercle black 6. pretiosa, sp. n. 



Thorax metallic blue 7. lessepsi, sp. n. 



l. Eriocera mesoxantha, sp. n., s . 



Head black ; thorax black above, except the interval between the suture and collar, which is red, with a dark 



longitudinal line ; abdomen yellow, segments 6 and 7 black ; wings pale brownish. 

 Length 15 millim. 



Hab. Mexico, Orizaba (Sumichrast). 



Head black ; antennae brownish ; frontal tubercle very little prominent. Thorax 

 partly black, partly yellowish-red ; the latter colour occupies the interval between the 

 suture and the collar, but is interrupted in the middle by a longitudinal dark line ; 

 the lower part of the pleurae, the pectus, and the coxae are also yellow; halteres with 

 brown knobs. Abdomen yellow ; extreme base and segments 6 and 7 black (the tip of 

 the abdomen is damaged by mould, and thus the colour of the genitals is not visible). 

 Legs (only the right middle leg is attached) black, the extreme base of the femora yellow. 

 Wings of a uniform pale brownish tinge ; a small stigmatic spot a little darker brown ; 

 tip of the auxiliary vein opposite the proximal end of the first submarginal cell ; there 

 are four posterior cells. 



A single male [coll. Bellardi). 



2. Eriocera zonata, sp. n., e ? . 



Prevailing colour yellow ; thorax with three black stripes ; abdomen with a black cross-band before the tip ; 



wings pale brownish-yellow. 

 Length : <$ , about 15 millim. ; $ , about 22 millim. 



Hab. Mexico, Orizaba (Sumichrast). 



