16 CLARK — TWENTY-FIVE NEW SPHINGIDAE Pvol.^in' 



The fore and hind wings beneath arc similar to those of M. p. rcclifas- 



oia, l>ut the lines are slightly fainter. 



Xylophanes germen brevis subsp. nov. 



Al. ant. long., d\ 27 mm. Al. ant. kit., d\ 13.5 mm. Marg. ext., 

 '.Is mm. 



Habitat unknown. Two males in coll. B. Preston Clark, received from 

 Dr. ( ). Staudinger and A. Bang-Haas. Unfortunately I cannot ascertain 

 the locality whence they came. 



The genitalia of these specimens are identical with those of 

 X. g. germen. In general coloration and maculation this form is 

 close to germen. It is, however, a shorter-winged insect, and 

 the width of the fore wing is greater in proportion to the length 

 than in the typical form, producing the impression of a really 

 different wing form. 



The dark markings of the fore wing stand out in sharper con- 

 trast to the ground tone than in germen. The median geminate 

 lunulate line which occurs in germen with greater or less 

 distinctness, is sharply marked in brevis, and starting from a 

 point 1 mm. distant from the hinder angle on the inner margin 

 there runs a similar geminate lunulate line diverging from the 

 distal margin and joining the median line midway between the 

 inner and the costal margins. There is thus formed a triangle 

 with its base on the inner margin. This occurs uniformly on 

 both specimens of brevis, and I do not find it on any of my 

 considerable series of germen. A faint trace of a line on one 

 specimen of germen runs parallel to the distal margin, and not 

 at an angle to it as in brevis. 



The shortened fore wing, its sharp markings, and the angled 

 geminate line, are the three outstanding characteristics of this 

 subspecies, of which at some time I hope to know the locality. 



