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published the following notes in an article entitled ‘‘ Unusual 
Number of Legs in the Caterpillar of Lagoa.’’* 
‘* Lagoa crispata Pack. is an interesting moth forming a connect- 
ing link between the Dasychire (Orgyia) and the Cochlidiz rep- 
resented by Limacodes and its allies. As we remarked in our 
Synopsis of Bombycidz (1864): ‘ When we observe the larva we 
would easily mistake it for a hairy Limacodes larva, for like them 
the head is retracted, the body is short, and _ the legs are so rudi- 
mentary as to impart a gliding motion to the caterpillar when it 
moves.’’ After describing the transformations, we added: ‘ There 
are seven pairs of abdominal or false legs, which are short and 
thick. The first pair of thoracic or true legs are much shorter 
than the two succeeding pairs.’ 
“‘Two years ago we found the fully fed caterpillars and also those 
before the last molt on scrub-oaks in Providence, and again noticed 
them while walking, then carefully examined them after placing 
them in alcohol, and again examined the specimens during the 
past winter. It is well known that caterpillars have no more than 
five pairs of ‘ proplegs,’ ‘false legs’ or abdominal feet, as they 
are variously called ; and so far as we have been able to learn, the 
present caterpillar is the only one which has additional legs, even 
though rudimentary. As in all lepidopterous larve, there are ten 
abdominai segments. In the larve before the last molt there is a 
pair of rudimentary abdominal legs on the second abdominal seg- 
ment, forming soft tubercles about one-third as large as the suc- 
ceeding normal feet ; the crown of hooks was wanting, but a tubercle 
on the anterior side corresponding to a similar one on the normal 
* In 1879, or six years before the publication of my note, Dr. H. Burmeister (Atlas de la 
description physique de la République Argentine, Lepidoptéres, Buenos Ayres, 1879, pp. 
xxii, Figs. 6a, 6b, 6c.) had described and figured with details, the larva of Chrysopyga un- 
dulata: “Les six anneaux suivants, du cinquiéme au dixiéme, sont pouryus de deux 
verrues charnues qui représentent les pattes membraneuses ventrales, dont le nombre est 
de six chez cette chenille, ce qui constitue une exception a la regle générale de la prés- 
ence de quatre paires de pattes membraneuses sur les anneaux 64 9. La premiére et la 
derniére de ces six paires de verrues se terminent en avant par un coussin rond aplati, 
noir, qui ressemble a la plante d’un pied, mais chez les quatres verrues moyennes (6 4 9), 
ily a un second coussin plus grand, qui ressemble a une véritable patte membraneuse 
pourvue d’une plante sinueuse et d’une couronne de petits crochets cornés, comme les 
pattes membraneuses en général (6, ¢), Le onziéme anneau est oblitéré au milieu, ainsi 
que le quatri¢me, mais sa présence est bien reconnaissable par les deux portions latérales. 
Enfin, le douziéme anneau est un peu plus grand que Jes autres et porte la derniére paire 
de pattes membraneuses, la septiéme qui est complétement conformée comme les quatres 
moyennes des six anneaux antérieurs, mais sans la petite plante accessoire de celles ci. 
Ces derniéres pattes sont pourvues seulement de la plante sinueuse garnie de crochets 
comme les autres. 
