[22 1J ON GUCULLIA INTERMEDIA AND 0. LUCIFUGA. gg 



other species, umbratica alone possesses. The last-named species also 

 corresponds in the cut of the secondaries with campanula, and is 

 additionally easily distinguishable by the faint, dull yellow streak on 

 the primaries, and in the white secondaries of the male. C. santolincB 

 Ramb. and C. chamomillce have indented secondaries and no black 

 crescentic lines on the terminal margin, and are characterized by the 

 deep black veins which run into the middle of the fringes. Santolince 

 is also smaller than intermedia, and chamomillm is differently colored 

 from it. The remaining species are even less liable to be confounded 

 with intermedia. 



So slight as the differences between the so simply and monotonously 

 marked imagines may appear, they are, on the contrary, very strongly 

 marked in the brilliant and variegated colors of the larvae. The larva 

 of intermedia is no exception to this rule, although, as may be expected, 

 in its earlier stages, it approaches nearer lucifuga than to the other 

 species. The larva of intermedia is described by Mr. Lintner of the 

 New York State Museum of Natural History, who is a close and reli- 

 able observer, as follows : " Sides with reddish spots, one on each seg- 

 ment, the first four square, the seven following semicircular, the two 

 on the last segment small. Dorsum with two small reddish spots on 

 the first four segments, a very indistinct spot on the fifth and one on 

 each of the last four segments. The caterpillar is very lively in its 

 motions and feeds generally at night." According to the figure accom- 

 panying the description, the ground color of the mature larva is dull 

 black, head and feet the same, color of the spots, which are of about the 

 same size as with lucifuga, lilac. Of its food and transformations 

 I have not been informed. Yery perfect specimens of the imago were 

 taken by Mr. Meske in Albany, N. Y., early in August. 



For the sake of comparison I give a detailed description of the larva 

 of lucifuga (which is however already accurately described by Treit- 

 schke, Schmett. v. Eur. X, 2, 128) from two specimens prepared by Mr. 

 O. Schreiner in Weimar in his masterly style. Mature larva black 

 with three parallel rows of orange-yellow spots. The row on the dor- 

 sum consists of twenty-five small spots, two on the first segment, three 

 each on the second and third, the first of which is rectangular, two each 

 of a round form on the fourth to the eleventh segments, and the last 

 two form a band instead of spots. The row on the side consists of thir- 

 teen spots, one on each segment.* Those on the second and third 

 segments are broader, made so by the small spot in front running 

 into the larger one behind ; those on the twelfth and thirteenth are 

 smaller and nearly touch each other; the last is a spot running 



[*Tlie author regards the body of the larva as consisting of thirteen segments, the 

 twelfth segment being properly divisible, it is claimed, into two distinct portions.] 



