4 PROCEEDINGS OF THE NATIONAL MUSEUM vol.75 



illary palpus short, four-jointed (three-jointed in GaleruceUa 

 nympJiaeae and Monoxia consputa), the basal joint crescent shaped 

 or almost closed-ring shaped, usually carrying two long, strong 

 setae and having two retractor muscles attached to the wall of the 

 well-chitinized stipes and extending through the soft, whitish pal- 

 piger which is characterized by its lack of individual muscles. (Fig. 

 Gl.) Eulabium (fig. 636) posteriorly limited by a chitinous postlabial 

 band bent in a single or double arch. Labial palpus two-jointed, 

 palpi inserted well apart, at a distance from each other somewhat 

 longer than the length of one of the palpi, except in Agelastica alni 

 where they are closer together. (Fig. 73.) Ligula short and thick, 

 with moderately long setae. 



Epipharynx (fig. 35) soft, beset with fine, short hairs. 



Hypopharynx (fig. 61) soft, distally with pointed, papilliform 

 hairs arranged in a patch inside of each lacinia ; no median transverse 

 bridge; no paragnaths; hypopharyngeal rods present, anteriorly 

 reaching very close to or fused completely with the ends of the band- 

 shaped chitinization at the bases of the maxillary lobes (fig. 64), 



Prothorax (figs. 3, 21) dorsally with a rather large, often irregu- 

 larly grooved and pitted saddle-shaped shield usually marked me- 

 dianly by a light sagittal suture. Setae often long, arranged as 

 marginal setae in one or more series around^ the whole shield and as 

 discal setae in small number in the central portion of it. Entire 

 tcrgum covered b}' the shield except for a soft-skinned, narrow region 

 following the outline of the shield and a soft-skinned, small, sub- 

 triangular area ^ located immediately behind the head, above the 

 ventro-lateral sulcus and in front of the oblique dorso-lateral sulcus. 

 Epipleural area behind the dorso-lateral and above the ventro-lateral 

 sulcus, triangular in form, with or without a setae-bearing sclerite 

 in the middle. Hypopleural area below ventro-lateral sulcus, covered 

 by a well-develof)ed prehypopleural and a well-developed posthypo- 

 pleural sclerite (=" episternum " and "epimeron" of authors). 

 Sternal region divided into the following areas : Eusternum, stcruel- 

 lum (=" furcasternum " of authors), parasternum, and poststernel- 

 lum (="spinisternum "). Eusternal area with a median unpaired 

 sclerite ; sternellar area Avith a sclerite on each side of the middle line, 

 eusternal and sternellar sclerites usually fused into a single, com- 

 pound sclerite (fig. 5); parasternal areas carrying the legs; post- 

 sternellar area without sclerite and setae. 



Mesothoracic and metathoracic segments (text fig. 2) dorsally 

 divided by a transverse median, at the ends anteriorly curved, sulcus 

 into the prescutal area {psc) and the scuto-scutellar area {sc-scl) ; 

 both areas carrying on each side an interior larger sclerite {int) and 



* Possibly coiTPspoiiclin?; to tho spiraciilar jireas of the followiug thoracic segments. 



