| OCR Text |
Show 1893.] ME. E. Y. WATSON ON THE HESPEEIID.3S. 9 arising at where they bifurcate from the main trunks: i. e. veins 1 and 12 of the fore wing, and I a and 1 b of the hind wing, are treated as arising from the base of the wing ; veins 2 and 3 of both wings as arising from their bifurcation with the median ; veins 7, 8, 9, 10, 11 of the fore wing and 7 and 8 of the hind wing as arising from their bifurcation with the subcostal ; veins 6 and 4 of both wings as arising at the points where they are met by the middle and lower discocellulars respectively; and, lastly, vein 5 of both wings as arising at the junction of the middle and lower discocellulars. The median from the base of the wing to the lower angle of the cell is termed the "lower margin of the cell," and the subcostal from the base of the wing to the upper angle of the cell the " upper margin of the cell." In the generic keys to the several sections the more superficial and readily recognizable characters have been constantly employed; the male secondary sexual characters, though used frequently, being taken only where the same character is found throughout the whole genus. It has been found impracticable to arrange the genera in their natural order in the keys, so the genera of each section are numbered in the order which seems most natural, and the descriptions are arranged to accord with these numbers. The following three subfamilies have been adopted in this arrangement, detailed descriptions of which will be found in the text, while they may be briefly compared as follows:- P Y R R H O P Y G I N . E . - T h i s is a well-marked group of closely allied genera confined entirely to the N e w World, which can be readily recognized by the large blunt club to the antennse, which is a constant character. The cell of the fore wing is also invariably very long, being more than two-thirds the length of the costa. Vein 5 of the fore wing is usually nearer to 4 than to 6. W h e n at rest they extend all their wings horizontally. H E S P E R I I N C E . - T h i s group includes all species with a costal fold in the male, all species in which vein 5 of the fore wing is nearer to 6 than to 4, and all species which rest with their wings extended horizontally. Some few species rest with their wings raised above the back, but these are very few and can invariably be recognized by the costal fold or some other character; also, in a considerable number of genera in which the cell is more than two-thirds the length of the costa, vein 5 is usually slightly nearer to 4 than to 6 ; this is occasioned by the upper angle of the cell being produced, and the middle discocellular consequently elongated. These genera, however, are readily recognized by the length of the cell, as in the Pamphilince, where it is only in a very few well-marked genera that the cell exceeds two-thirds of the costa. The antennse, almost without exception, end in a fine point, and in the few genera in which this is not the case the cell is invariably short. PAMPHiLiNiE.-This group includes all species with a discal band on the fore wing of the male, and all species in which vein 5 of the \ , ....... ., |
