HYPEEALONIA. 91 



Eab. Mexico (Sumichrast, de Saussure), Tres Marias Islands (Forrer), Merida 1 in 

 Yucatan. 



Antennae dark brown, the basal joint reddish ; style of the third joint nearly as long as the 

 joint itself. Head brown, with reddish appressed scales and black erect pile on the front ; 

 face and environs of the mouth more reddish ; proboscis not protruding. Thorax dark 

 brown, anteriorly with a collar-like fringe of dark rufous hairs, hedged in posteriorly by 

 a similar fringe of black hairs ; tufts of rufous hairs behind and below the humeri ; 

 black hairs on the humeri, as well as below, in front of the front coxa? ; a bright rufous 

 tuft between the tegula and the haltere ; similar tufts on the sides of the abdomen, on 

 segments 1 and 2. Abdomen: first segment black; second anteriorly with a narrow 

 cross-band of yellowish- white scales, expanded on the sides; the ground-colour of the 

 following segments is reddish-brown, darker in the middle, but more or less concealed 

 under a dense covering of scales and hairs ; the scales become more distinctly white 

 towards the end of the abdomen, especially on the last two segments ; the hairs are 

 black, erect, rather uniformly spread over the whole surface, forming a distinct black 

 fringe on the sides, beyond the tufts of rufous hair already mentioned. Venter brown 

 on the three basal segments, the remainder red, with appressed yellowish-white scales. 

 Legs : front pair dark brown ; tibiae of the middle pair, and femora and tibiae of the 

 hind pair, more rufous, partly on account of the appressed rufous scales which cover 

 them. On the wings the brown colour reaches the tip of the costal cell, slightly 

 encroaches upon the proximal ends of the second and third submarginal cells, thus 

 leaving the whole apex hyaline ; a large hyaline spot in the distal part of the discal 

 cells, coalescing with the hyaline posterior margin, produces a deep excision in the 

 brown (see Macquart's figure) ; the posterior margin, which is hyaline in Macquart's 

 type, is often spotted with brown as follows — a large spot on the coarctate portion of 

 the first posterior cell, and paler ones along the margin in the third and fourth posterior 

 cells and at the end of the anal cell (some of them sometimes wanting) ; a subpellucid 

 small spot near the proximal end of the discal cell, and another in the distal portion of 

 the first submarginal, seem to be more constant. 



I had for comparison three specimens, apparently males, from Prof. Bellardi's 

 collection ; and a single male from the Tres Marias Islands, Western Mexico. 



N.B. — In Macquart's figure the tip of the costal cell is represented as hyaline ; this 

 is not quite correct, as it is always more or less encroached upon by the brown. 



3. Hyperalonia dido, sp. n., e ? . (Tab. I. fig. 17.) 



Four submarginal cells ; wings hyaline with a brown basis, an oblique brown cross-band across the proximal 

 end of the discal cell, and a second one across the middle of the marginal cell, two brown dots on the margin 

 of the wing ; abdomen with a broad white cross-band on the second segment, and with silvery scales 

 towards the tip, but without well-marked white or silvery spots. 



Length 19 millim. 



Eab. Mexico (Truqui, Sumichrast, coll. Bellardi), Tres Marias Islands (Forrer). 



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