DIPTERYGIA: PAEASTICHTIS. By W. Warren. 163 



M. phaeochroa limps. (41 d). Forewing grey In-own: the veins not pale; the inner line curved and phaeochroa 

 waved obliquely outwards: the claviform large, red 1> row n ; the upper stigmata grey, the cell brown 

 before the orbicular and between the two stigmata; and the median area brown beyond the reniform, 

 continued as a narrow band to inner margin; otherwise like nyctichroa. Wa-shan, W. China. 



S. Genus: Dipterygia Stph. 



Tongue well-developed; frons smooth, with a pad of scales; palpi upturned, second segment roughly 

 sealed, the terminal smooth; antennae of $ ciliated: thorax with a double ridge-like crest; abdomen with 

 dorsal crests; forewing elongate, with the costal and inner margins subparallel; the termen crenulate and 

 slightly excised above anal angle. Larva stout and thick, with a hump on segment 11; on low plants, 

 pupating in a slight cocoon on the ground. Type Dipterygia scabriuscula L. 



Sect. II. Thorax and mid femora of o without thick tufts of dark hair. 



D. scabriuscula L. (= pinastri L., triptery_gia Esp.) (38 f). Forewing brown black; the inner margin scabriuscula 

 narrowly and the postmedian space below vein 3 whitish, with the veins and intervals marked with pale 

 olive brown, often some pale brow-n suffusion also about vein 6; a fine black streak from base below cell; 

 the lines and edges of stigmata black; inner line with 4 angles outwards, that below vein 1 long and 

 acute; outer line oblique outwards to 5, forming a projection between 4 and 5, then Insinuate to middle 

 of inner margin: claviform stigma long and narrow; orbicular oval, flattened, sometimes touching the 

 large reniform: terminal area with black streaks between veins; subterminal line visible only below vein 2, 

 the anal angle beyond it blackish; hindwing fuscous. - — Larva redbrown, marbled and dotted with darker; 

 dorsal line finely white with brown edge; lateral lines broadly pale, dark-edged above, crossed by a series 

 of oblique brown stripes; head brown with black streaks; on Rumex, Polygonum, and various other plants. 

 Occurs throughout North and Central Europe, and in Asia Minor and Armenia. 



D. caliginosa Walk. (38 g). Larger, more brown black than scabriuscula; but the inner margin and caliginosa. 

 anal space much darker brown; the outer line, which in scabriuscula is Insinuate with a rounded outer 

 projection below vein 2, is also biconcave, but forms a rectangular projection between on the submedian 

 told: otherwise as in scabriuscula; hindwing with more distinct dark outer line and submarginal shade. 

 Japan and China. 



D. japonica Leech (38 g). Intermediate in point of size between the Western scabriuscula and the japonica. 

 Eastern caliginosa; from both it is distinguished by the course of the outer line, which below the middle 

 is much more oblique, forming, like caliginosa, an angular prominence on the submedian fold, but thence 

 running obliquely and touching the elongated tooth of the inner line below vein 1. Yokohama, Japan: 

 also from Ichikishiri, Yesso. 



9. Genus: Parastichtis Hb 



ii. 



Tongue present; frons smooth, with a pad of hair; palpi obliquely upturned, second segment hairy 

 in front, third short, smooth; antennae of <$ pubescent, very shortly ciliated; thorax, pectus, and tibiae 

 hairy: a double dorsal ridgelike crest on thorax, higher at each end; dorsum slightly crested, and with 

 lateral fringes, the anal tufts large; forewing elongate, widening outwards; termen crenulate. Larva, as far 

 as is^ known, all feeding on grasses, overwintering and feeding up in spring; pupa in a cocoon among the 

 roots. Type Parastichtis hepatica L. 



P. lithoxylea F. (= sublustris Esp. (part), musicalis Esp.) (39 c). Forewing whitish ochreous, Uthoxylea. 

 faintly washed with pale brown; veins brown before termen; inner and outer lines pale, brown-edged, more 

 or less interrupted except on costa; the inner with sharp long teeth outwards between veins, the outer 

 marked by a double row of brown vein dots; a broad diffuse brown median shade ending on submedian 

 fold where it is margined distinctly with brown; submarginal line acutely dentate, preceded by olive brown 

 wedgeshaped marks, and followed by darker brown dentate marks to margin, strongest on both folds; 

 orbicular and reniform hardly marked, separated by the brown median shade; hindwing whitish ochreous, 

 with the veins and cell spot brown; a diffuse brownish submarginal cloud. Larva ochreous or greenish 

 grey, with dark tubercles; head and thoracic plate black larown; at roots of grass. Occurs throughout 

 Europe, also in Asia Minor, Armenia, and W. Siberia. 



P. sublustris Esp. (= lithoxylea Hbn. nee F., musicalis Dup. nee Esp.) (39 c). Differs from litho- subluslris. 

 xijlea F. in having the forewing shorter, more strongly suffused with brown, or brownish grey, especially 



