Geometridae of the Argentine Mejynhlic. 
811 
198. Microgonia mundata (Guenee). 
Oxydia nmindata, Guenee, Spec. Gen. des Lep., ix, 58, tab. 
X, i (1858).^ 
Microgonia nmindata ab. crassior, Warren, Nov. Zool., xiv, 
312 (1907) (ab.).2 
Mendoza (W. M. Bayne), in coll. L. B. Prout, et coll. 
A. F. Bayne ; La Rioja (E. Giacomelli), in coll. L. B. Prout 
et coll. Br. Mus. 
Range : Brazil (^), Paraguay, in coll. L. B. Prout, etc.; 
Peru, Ecuador, etc. 0. Mr. Warren inclines to think that 
these latter form a local race, distinguishable by their 
larger size, deeper colour, and stronger markings; yet he 
only erects it as an “ aberration.” I have insufficient 
material from the more northerly localities to allow of my 
forming a definite opinion, but it seems doubtful whether 
the distinctions are really racial; at any rate I possess the 
strongly-marked forms from Sapucay and Porto Alegre, 
and my Mendoza series shows a wide range of colour- 
variation. 
Mr. W. M. Bayne has bred a fine lot exovo, from Palmira 
and perhaps other localities in Mendoza. One generation 
appeared (perhaps more or less forced ?) in June and July 
1903, another in December of the same year. The latter 
brood seems the lighter-coloured, though both vary. None 
are quite so light as some specimens which I possess from 
other localities, and the first brood consists of more or less 
reddish-brown forms, one or two of the most extreme 
becoming fuscous brown. The zigzag subterminal shade 
of the hindwing is weak in the entire series of both 
broods, often barely traceable. My three examples from 
Dr. Giacomelli, La Rioja, also vary a good deal; all three 
belong to the lighter forms, but one is richer (more 
ochreous) and strongly marked, one greyer and weaker- 
marked. 
The pupa reminds of that of Gyno'pteryx gladiaria, 
having nearly the same colour and markings, but it is of 
course larger. The anal extremity has only two supple¬ 
mentary hooks, not six, as in gladiaria. 
Pero (Herrich-Schaeffer). 
Pero, Herrich-Schaeffer, Samml. Aussereur. Schmett., i, 28 
(1855). 
