134 KANSAS UNIVERSITY SCIENCE BULLETIN. 



the clypeus or ipostoma (epistoma) corresponds to the frons of 

 Pachijpsijlla, the two terms "ipostoma" and "clypeus" being 

 generally used interchangeably by him. Cmx of my figures is 

 the ipostoma; xyz is the 7od-shaped apophyse of the clypeus; 

 the thickened, basal edge of the frons, z, is the transverse bar of 

 the ipostoma; the opening, for (29-1), is the foramen of the 

 ipostoma. The structure which Meek calls the tentorium is 

 designated by Berlese the transverse branch of the ipostoma. 



THORAX. 



The thorax as described by Riley: "Pronotum moderately 

 short, of equal width, slightly emarginate behind, steeply as- 

 cending posteriorly ; lateral impressions sculptured and colored 

 as the head ; well marked. Dorsulum well developed, thrice as 

 long as the pronotum, and about twice as wide as long; poster- 

 ior lobe distinctly longer than the anterior ; hind margin sinuate 

 each side and truncate at middle; surface finely alutaceous; 

 color, light brownish yellow with a large brown apical spot 

 divided by a yellow median line. Mesonotum convex, wider 

 than head, sculptured as dorsulum, with four vittse (longi- 

 tudinal) of brown or greenish-brown color, the outer ones 

 usually wider than the inner ones, all bordered and divided 

 transversely by lines of brighter yellow." 



Prothorax. — Viewed from above the thorax is seen to be 

 composed of a number of sclerites, as seen in 27-S, A and 

 B, which upon closer examination and dissection may be shown 

 to make up the three typical regions of the thorax. In the 

 prothorax there is only one sclerite composing the tergum — 

 the pronotum (27-3, A and 31, pn) . This is collarlike, steeply 

 ascending, as seen in the longitudinal section (fig. 3 B), some- 

 what wider at the middle than laterad, where an obscure 

 suture divides it from the pleural sclerites. This is shown in 

 plate XXVII, fig. 1, and plate XXXV, fig. 12. The proepi- 

 sternum and sternum are very closely fused and the suture is 

 scarcely evident. The proepimeron (27-1, em i) is a rather 

 wedge-shaped piece, rounded on its ventral end, lying back of 

 the ventral portion of the pronotum and the dorsal portion of 

 the proepisternum. Situated in the pleural membrane beneath 

 the proepimeron is the prothoracic spiracle, sp. As seen in 

 35-6, the prosternum is only slightly developed, its cephalic 

 edge on each side being produced entad into a slender portion. 

 The prothoracic coxae are large and occupy, together with the 



