JAMES A, G. REHN 217 



This, however, Burr has stated cannot be considered of generic 

 value, and his Propyragra , based on this feature, is now placed 

 by him in the synonymy under Pyragropsis.'^ 



The nearest ally of the new form is P. thoracica Serville, which, 

 according to Burr, agrees in the emarginate penultimate abdomi- 

 nal segment of the male, but from which emarginata differs in the 

 obliquel}' instead of squarely truncate distal margin of the teg- 

 mina and in a number of features of th(5 color pattern, as the bi- 

 colored exposed portion of the wings, the spotted tegmina, the 

 absence of rufous from the pronotum and more infuscate limbs. 

 When compared with the very ample and satisfactory descrip- 

 tion of P. tristani Borelli, which is also very close to the new form, 

 the latter is found to differ in having twenty-two antennal seg- 

 ments, in the obliquely truncate instead of rounded distal margin 

 of the tegmina, in the caudal margin of the disto-dorsal abdominal 

 segment being truncate instead of concave, and in certain color 

 differences, as the absence of longitudinal tegminal bars and in the 

 femora having the same base color as the tibiae. 



Size rather small; form weakly depressed; surface entirely dull except that 

 of the disto-dorsal abdominal segment and of the forceps which are moderately 

 polished, dorsal surface of unpolished abdominal segments probably in an 

 imrubbed condition completely covered with silvery scales, well marked traces 

 of which remain, long and short hairs disposed over the surface as in P. tristani. 

 Head triangular, caudal angles roundly obtuse, occipital margin straight, 

 surface of occiput gently convex dorsad, indications of several short irregu- 

 lar sulci present, usual transverse sulcus not indicated; eyes but little 

 prominent; antennae composed of twenty-two segments, proportioned as 

 in P. tristani. Pronotum very slightly broader than long, general form as in 

 tristani but caudo-lateral angles more rounded; cephahc two-thirds of siu-face 

 subconvex, remainder flattened and moderately elevated toward the lateral 

 and caudal margins; medio-longitudinal sulcus delicate but continuous. Teg- 

 mina one and one-half times as long as the pronotal disk, lateral outline when 

 viewed from the dorsum gently arcuate, the tegmen appreciably narrower 

 distad than mesad; caudal margin obliquely truncate. Exposed portion of 

 the wings not more than a fourth as long as the tegmina, apices squarely trun- 

 cate, lateral outline arcuate. Scutellum exposed between the tegminal bases, 

 subtrigonal. Abdomen moderately broad, subfusiform, all of the dorsal seg- 

 ments more or less produced caudate along the lateral line, the sixth, seventh 

 and eighth segments with carina similar to P. tristani, structure of same region 

 of ninth segment similar to tristani; disto-dorsal abdominal segment with the 

 caudal margin truncate, sculpture as in tristani; forceps as in tristani but faintly 

 more slender; penultimate ventral segment with the lateral margins converging 



* Burr, Ann. and Mag. Nat. Hist., (S), ill, pp. 33:5 to 334. 



TRANS. AM. ENT. SOC, XLII. 



