MEMOIES OF THE NATIONAL ACADEMY OF SCIENCES. 61 



The pupa. — Unfortunately we are as yet ignorant of tbe i)upa form. Dr. Chapman has only 

 found the headpiece of tlie pupa, but refers it to the " Incompleta;," and thinks it probable that 

 the pupa has the " third and folio ning abdominal segments free." 



The c(j(j. — The e'^g, according to Cha])man, is " large and spherical," in confinement deposited 

 in little groups, to the number of I'o in all. 



Diagnostic characters of the Lepidoptera Jaciniata: — I add the characters of this suborder. 

 Imago : Maxilla, with a well-developed lacinia and galea, arising, as in maudibulate insects, from a 

 definite stipes and cardo; the galea^ not elongated, nor united and differentiated into a haustellum, 

 each being separate from its fellow. The maxillary palpi enormous, six-jointed; mandibles large, 

 scarcely vestigial, with a broad-toothed cutting edge, and with three apiiarently functional hinge 

 processes at the base, as usual in mandibulate insects. Hypopharynx well developed, somewhat 

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

 those of mandibulate insects; palpi three jointed. Thorax with prothor ax very much reduced; 

 metathorax very large, with the two halves of the scutum widely separate. Venation highly 

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

 veins as in Micropteryx and showing no notable distinction compared with those of that genus; 

 scales generalized; tine, scattered setie present on costal edge and on the veins; abdomen 

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

 appendages very large. 



Egg spherical. Larva in form highly modified, compared with that of Micropteryx, with large 

 four-jointed antenuii; and very large three-jointed maxillary polpi; no spinneretl No abdominal 

 legs, their place supplied by a pair of tubercles ending in a curved spine on segments 1-8; a sternal 

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



Suborder II. — Lepidoptera haustellata.' 



This gronp may be defined thus: Maxillfe with no lacinia, the galeaj being highly specialized 

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

 palpi. The maxillary ])alpi 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 fitsed with the 

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

 male genital armature. 



Pupa incomplete, the abdominal segments 3 to C or 7 free; in the more generalized primitive 

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

 tlap-lilce ])iece on the outside of the maxilhv; the labial palpi often visible; clypeus and labrum 

 distimt; i>araclypeal pieces distinct; no cremaster, or only a rudimentary one, in the generalized 

 jnimitive forms. 



Larva? with usually a prothoracic dorsal chitinous jjlate; the armature consisting in the 

 primitive fin-ms 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 fleshy 

 tubercles or spines of various shapes ; five pairs of abdominal legs, with booklets or crochets forming 

 a complete circle in the more generalized forms (in Hepialid;? several complete circles), the booklets 

 in the later, more speciahzed groups usually forming a semicircle situated on the inner side of the 

 planta. 



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

 ruJcolepidopiera and tbe NeoJcpiditptera. 



'If the term Lepidoptera liaiistellata should be thought inapplicable from the use of the word. Haustellata for 

 haiistflhiti' insects by foruier authors, the term Lepidoptera glossata could be used instead. 



