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iMEMOirtS OF THE NATIONAL ACADEMY OF SCIENCES. 



and flattened, the segments very short in proportion to their \yi(It]i, the prothoracic segment,, 

 however, very long in proportion to the others, but tlie surface rough and corrugated, not with a 

 hard smooth dorsal phite, as in many Tineida-, Tortricida^, Cossidie, etc., since it is not a boring 

 insect. The eight pairs of abdominal prop-like tubercles, which we should hardly regard as 

 homologues of the abdominal legs, are, like those of the Panorpida', simple tubercles armed 

 with a spine. The tenth or last abdominal segment is armed with a pair of dorsal spines, each 

 arising from a tubercle. The singular flattened and fluted seta^ represented by Chapman are 

 unique in lepidopterous larv.'e. He also describes a trefoil shaped sucker on the under side of 

 the ninth and tenth abdominal segments, "very unusual," though as it appears to be paired it 

 does not seem to me, as Chapman thinks, to indicate " a further point of relationship to Limacodids." 

 Dr. Chapman states that "the head is retractile so far that it may occujjy the interior of the 

 second thoracic segment," and he says that "the antenn* are remarkably long for a lepidopterous 

 larva." He remarks that "there are two strong mandibles, with four brown teeth," and adds: 



Two pairs of palpi are also visible — two and tUree-joiiited — apparently those usual in lepidopterous larv:c, but- 

 I have not defined their relations. There is also a centr.al poiat (spinneret). 



I add rough sketches of the mouth parts, as far as I could draw them with the camera from 

 specimens mounted in balsam by Dr. Chapman. The labruin (flg. 4, D Ibr.) is less divided than 



Fig. 4. — Head of larv.a of Enocepkala calthella. A, anterior region enlarged: uid. mandible; 

 mx, maxilla; ant, antennje ; sp. spinneret?; B, 1st masillai and 2d maxillpe Ip; C, the same; 

 X), labrum {Ibr). 



usual in lepidopterous larvte, but is not, except in this respect, much unlike that of Tineids eg. 

 Gracilaria (see Dimmock's flg. 2, p. 100, Psyche, iii); The four-Jointed autenuie (fig. 4, ant.),- 

 ending in two unequal setre, are of very unusual size and length, and so are the iniixillary palpi 

 (flg. 4, m.r. }).), which are much larger than in any caterpillar known to me, and are greatly 

 in disproportion to the maxillary lobes; the maxilla itself difters notably from that of other 

 caterpillars; what appears to be the lacinia is palpiform and two-jointed. The labium and its 

 palj)i are much as in Gracilaria, but the palpi appear to be three-Jointed, with a terminal bristle 

 (it is iiossible that there are but two Joints). Unlike the larva of Micropterys, that of Eriocephala 

 does not appear to possess a well-marked spinneret, while it is easy to see it in the former genus. 

 In Eriocephala I can only detect a lobe, whicli appears to be simply the rudiment (Anlage) of a 

 spinneret (unless the latter is in my specimens bent under the head); but this organ needs 

 fiirther examination on fresh specimens. It would be interesting if it should be found that the 

 spinneret is in a generalized condition, as compared with that of Micropteryx. 



