MEMOIES OF THE NATIONAL ACADEMY OF SCIENCES. 61 



The pupa. — Unfortunately we are as yet ignorant of tlie pupa form. Dr. Chapman has only 

 found tlie, licadpiece of the pupa, but refers it to tlie " Incompletiv," and tliinks it probable that 

 the pupa has tlie '• third and followiny;- abdominal segments free." 



The e(j(j. — The Qgg, according to Cha])mau, is " large and spherical," in confinement deposited 

 in little groups, to the number of 25 in all. 



Diugiwstie characters of ike Lcpidoptera laciniata. — I add the characters of this suborder, 

 imago: Maxilla, with a well-developed laciuia and galea, arising, as in mandibulate insects, from a 

 detinite stipes and cardo; the galeae not elongated, nor united and difl'erentiated into a haustellum, 

 each being separate from its fellow. The maxillary palpi enormous, sixjointed; mandibles large, 

 scarcely vestigial, with a broad toothed cutting edge, and with three api>arently functional hinge 

 processes at the base, as usual in maiulibulate insects. Hypopharynx well develojied, somewhat 

 as in Diptera and Hymeuoptera. The second maxilhe divided into a mala exterior, recalling 

 those of mandibulate insects; ])alpi three Jointed. Thorax with prothorax very much reduced; 

 metathorax ^•ery large, with the two halves of rhe scutum widely separate. Venation highly 

 generalized; both fore and hind wings with the internal lobe or "jugum," as in Trichoptcra; 

 veins as in Micropterj'x and showing no notable distinction compared with those of that genus; 

 scales generalized; flue, scattered seta^ present on costal edge and on the veins; abdomen 

 elongated, with the male genital armature ncuropteroid, exserted; the dorsal, lateral, and sternal 

 ■iippendages very large. 



Egg spherical. Larva in form highly modified, compared with that of Microptei-yx, with large 

 four-jointed autenniB and very large three-jointed maxillary palpi; no spinneret?. No abdominal 

 legs, their place supplied by a pair of tubercles ending in a curved spine on segments 1-S; a sternal 

 sucker at the end of the body. Pupa libera ?. 



Suborder II. — Lepidoptera haustellata.' 



This group may be defined thus: Maxilhv with no lacinia, the galea? being highly specialized 

 and united with each other to form a true tubular haustellum or glossa, coiled up between the labial 

 palpi. The maxillary palpi large, and five or six-jointed in the more generalized forms, usually 

 vestigial or entirely wanting in the more modern specialized families. Mandibles absent as a rule, 

 only minute vestiges occurring in the same generalized forms. Wings both jugate and frenulate, 

 mostly the latter; tending to become broad and with highly specialized scales, often ornamented 

 with spots as well as bars, the colors and ornamentation often highly specialized; the thorax 

 highly concentrated, the metathorax becoming more and more reduced and fused with the 

 niesothorax; the abdomen in the generalized forms elongated and with a large exserted abdominal 

 male genital armature. 



Pupa incomplete, the abdominal segments 3 to G or 7 free; in the nioi'e generalized primitive 

 forms the end of each maxillary palpus forming a visible subocular piece or "eye collar'' or a 

 flap-like i)icce on the outside of the maxilhe: the labial palpi often visible; clypeus and labrum 

 distinct; paraclypeal pieces distinct; uo cremaster, or only a rudimentary one, in the generalized 

 primitive forms. 



LarviB with usually a prothoracic dorsal chitinous plate; the armature consisting in the 

 primitive forms of minute one-haired tubercles, the four dorsal ones arranged in a trapezoid on 

 abdominal segments 1-8, becoming specialized in various ways in the later families into fieshy 

 tuljcrcles or spines of various shapes ; five i)airs of abdominal legs, with booklets or crochets forming 

 a coimplete circle in the more generalized forms (in Hepialidas several complete circles), the booklets 

 in the later, more specialized groups usually forming a semicircle situated ou the inner side of the 

 planta. 



This suborder may be subdivided into two series of superfamilies and families, the 

 ruleolepidoptera and the Neolepidoptera. 



'If the term Lcpidoptera haustellata should be thought inapplicable from the use of the word Haustellata for 

 haustellate insects by former authors, the term Lepidoptera gloaaata could.be used instead. 



