INSECUTOR INSCITI^ MENSTRUUv^? 123 



1851, was a similarly abnormal specimen. The descriptions of 

 Wiedemann and Macquart, and especially the figures of the 

 latter, make it clear that both had this form with the aborted 

 tegute. Brauer's, Wulp's, and Schiner's notes and Brauer & 

 Bergenstamm's descriptions, as well as Walker's 1849 descrip- 

 tion, also positively indicate this form. Only Macquart, 

 Walker, and Townsend have noted the atrophied tegulse. 



Eucordyligaster, new genus. 



Genotype, C or dylig aster septentrionalis Townsend, 1909, 

 Ann. Ent. Soc. Amer., II, 250. 



Differs from Cor dylig aster by possessing well-developed 

 tegulas of the normal type, petiole of abdomen much stouter, 

 female abdomen proportionately not so swollen, male abdomen 

 not strongly compressed and not more elongate than that of 

 female, front wider, and male forceps and claspers heavier. 

 Wings normally much less infuscate. 



Cordyligaster minuscula Wulp and C. nyomala Towns, both 

 belong to this genus. 



Siphoplagiopsis, new genus. 



Genotype, Siphoplagiopsis similis new species. 



Differs from Siphoplagia as follows : Proboscis fully ex- 

 tended only a little exceeding the head height in length. Anal 

 segment of female abdomen projected obliquely downward and 

 backward, truncate-conical in form, more or less polished 

 above, normally with pollen only at base, with few hairs and 

 normally no macrochaetse, thus markedly contrasted with the 

 other segments in vestiture as well as in form. Larvipositor 

 telescoped, ending in two spatulate lobes, large, laterally com- 

 pressed, projected downward from anal segment. First vein 

 spined throughout, third nearly to end, fifth with none to four 

 scattered bristles on or near base. In some cases the anal seg- 

 ment is almost wholly pollinose except the hind border and the 

 microchaetse are almost as well developed as on the other seg- 

 ments ; in other cases, macrochsetse are represented by two to 

 four longer bristly hairs in an arcuate discal row ; in all cases, 

 marginal macroch?ct?e are lacking on anal segment. 



