ART. 17 WASPS OF THE GENUS TIPHIA— ALLEN AND JAYNES 7 



straight lanceolate to prickleiike (pi. 3, figs. 22 and 23) and in 

 arrangement from a straight row to an irregular group, with or 

 without one of the same kind of spines at the extreme apex. 



Wings. — The tegulae are occasionally much longer than wide. 

 They are usually thick and dense, opaque black, but in some species 

 they become semi-transparent and bright red or brownish. Sha- 

 greening is occasionally found, though fainter than on the front. 

 A marginal groove is present in some species, and a faint marginal 

 impression on the outside is even more common. The wings seem to 

 have very few diagnostic characters in the female. In the male, the 

 apical extension of the radia^ cell varies greatly between species, and 

 is considered to be equal to the second cubital cell when a line drawn 

 from the lower outer angle of the second cubital cell perpendicular 

 to the costa touches the end of the radial cell for a part of its length. 

 It may be either longer (pi. 4, fig. 25) or shorter (pi. 4, fig. 26) 

 than this. Smokiness, associated with distinctness of the hyaline 

 tracings, varies among species, but can not be finely differentiated. 

 A peculiar tracing in the first cubital cell below the stigma is termed 

 the f.rst cuhital mark (pi. 1, fig. 7). Vein curvatures and ratios 

 of comparison between the lengths of different abscissae appear to be 

 highly variable within the species. 



Pro podeu7?h.— The principal characters of the propodeum are the 

 shape (pi. 2, figs. 10 to 14), and the length of the areola (fig. 1, a) 

 or dorsal enclosure, the nature and extent of the carinae, the presence 

 or absence of shagreening, striae, and minute setigerous punctures on 

 the area beneath the parallel rugae on the lower aspect termed the 

 Joiner portion of the side (fig. 1. / pro). The conformation of the 

 areola in the male is quite variable within the species, and is therefore 

 unreliable in this sex. The length of the areola is expressed in terms 

 of its width at the anterior limit. The outside carinae may or may 

 not be bordered by grooves. The grooves, when present, may or may 

 not be interrupted by man}^ transverse ridges. When interrupted 

 in this way the groove is called crenulate. The posterior aspect 

 appears to offer few good characters. Its sculpturing is rather faini 

 and is variable within species, but the length of the medial carina 

 is fairly constant, and is perhaps the best character of this region. 



Abdo'7iie7i. — The first abdominal tergite (fig. 1) furnishes a num- 

 ber of good characters. No median transverse ridge or groove, such 

 as is common in North American species, has been found to occur on 

 any of the Asiatic species examined. In the koreana group, however, 

 there occurs a deep preapical, groove (pi. 2, fig. 15) which is over- 

 lapped at the middle, and is an excellent diagnostic character, al- 

 though apparently easy to overlook because of its proximity to the 

 normal apex of the segment. This groove is always associated with 



