VOL. IV.] Description of a Ltmtinous Larva. 129 



anteriorly where it is but little wider than the head. Segments 

 three to eight equal in length, each hardly two-thirds length of 

 second, very gradually widening to eighth, which is but little 

 wider than three; segments nine to twelve a little longer, hardly 

 wider than others; thirteen a little longer than twelve, not as 

 long as second, a little narrowed and rounded ofif behind, with a 

 segment-like anal joint or appendage which shows very plainly 

 on the ventral surface, making the larva appear fourteen-jointed, 

 and is doubtless homologous with the so-called anal proleg, 

 though it does not appear to possess this function in the present 

 case. All the joints except head covered dorsally with fine 

 short posteriorly directed bristly hairs, longer and directed more 

 outwardly on^sides, extending down on lateral ventral surface; 

 median ventral surface less distinctly short hairy except on 

 thoracic segments. Head bears some bristly very short hairs on 

 edges. A moderately large black convex simple eye on outer 

 anterior edge of head, rather prominent, partially hidden by the 

 head being retracted within the overlapping anterior dorsum of 

 prothorax. Antennae short, situated just anterior to and inside 

 of eyes; basal joint stout and rather tubercular, second joint 

 smaller, about as wide at base as long, subconical, bearing some 

 bristly hairs; third joint minute, as long as broad, terminated 

 by a few short hairs. Mandibles apparently single-toothed, 

 blackish, curved, and rather claw-like, not stout. Maxillae two- 

 jointed, stout, the joints rather cylindrical; second joint as long 

 as wide, but narrower than the basal. Maxillary palpi small, 

 apparently two-jointed, the second joint but little smaller than 

 the basal. Labial palpi very small, slender, two-jointed, the 

 joints short and subequal; an anterior prolongation of the labium 

 between them surmounted by two fine hairs. Prothoracic 

 segment deeply notched anteriorly below with a V-like fold of 

 the integument extending not quite to its posterior margin, 

 exposingJwhat seems to be a separate sclerite belonging to the 

 prothoracic segment. Spiracles situated about middle of lateral 

 edges of [segments five to twelve inclusive, but appearing 

 anterior to middle when the segment is retracted. Legs appar- 

 ently four-jointed, basal joint elongate, appearing as a prolonga- 

 tion of [the integument; second joint short, about one-half 



