Species of the Genus Larinopoda. 



257 



On the posterior end of the thorax just above the attach- 

 ment of the abdomen there appears to be a membrane 

 divided into two nearly circular tympana. Whether this 

 is merely the structure of that part of the thorax or is an 

 organ comparable to the thoracic tympanum in Geome- 

 tridae, Uranidae and other moths, I am unable to decide 

 until I can obtain material in a proper condition for 

 dissection. 



KEY TO .SPECIES AND FORMS OF LARINOPODA. 



H.-w. beneath with a spot in cell. 

 H.-w. beneath without a spot in cell. 



(a) H.-w. beneath with delicate undulating 



shading. ..... 



H.-w. beneath without delicate undu- 

 lating shacHng .... 



(b) H.-w. beneath with dark border, broad 



and even or broken into more or less 

 triangular spots, or even merely 

 suffused. 

 H.-w. beneath without dark border. 



(c) Ground-colour cream white, h.-w. 



border broken into triangular spots. 

 Ground-colour chalk white, h.-w. 

 border not broken into triangular 

 spots. 



(d) H.-w. beneath with submarginal 



spots. ..... 



H.-w. beneath without submarginal 

 spots. ..... 



(e) H.-w. beneath with submarginal spots. 

 H.-w. beneath without submarginal 



spots. 

 (/) H.-w. above with broad dark border. 

 H.-w. above without broad dark 

 border. ..... 



(g) Ground-colour creamy white 

 Ground-colour chalky white. 

 (h) H.-w. with submarginal spots. 

 H.-w. without submarginal spots. 



(a). 

 (h). 



iera. 



(c). 

 {d). 



(0. 

 lircaea f. spuma. 



lircaea f. hermansi. 

 asjndos i.brenda (part). 



if)- 

 aspidos aspidos, (J. 



aspidos aspidos, $. 

 lircea. 



(h). 



(i). 

 lagyra. * 



* Occasional examples of aspidos female have hardly any brown- 

 ish scaling beneath and are very difficult to distinguish fi-om lagyra. 

 Generally, however, at least a few such scales can be distinguished. 



TRANS. ENT. SOC. LOND. 1922.- — PARTS I, IT. (JULY) S 



