with remarks on some aherrant genera of the ScoliidiB. 75 



Thynnus clegans, Sm., Cat. Hym. B. M., vii, p. 51, n. 176, 

 1859, $. 



Maphroptera maculipennis, Guer. 



Elaphroptera, maculipennis, Guer., Voy. Coq. Zool., ii, 2, 



p. 243, 1830 (1839), $. 

 Thynnus mystacinus, Klug, Physik. Abh. Akad. Wiss. 



Berlin, p. 27, n. 28, 1840 (1842), $. 

 Thynnus ornatus, Klug, 1. c, p. 29, n. 31, ^. 

 Thynnus plagiatus, Sm., Cat. Hym. B. M., vii, p. 52, n. 178, 



1859, $. 



There are two pairs from Parana in the British Museum 

 collection. The female agrees well with Klug's description 

 of ornatus, the males are without the yellow spot on the 

 mesonotum which is present in the type of Smith's species. 



The three species last named are allied to lateralis, 

 Klug, U. ichneumonea and U. avida most closely so. They 

 will probably form a new genus when more material is 

 available, in view of the short, broadly emarginate clypeus 

 of the male, produced into a spine at the angles; and the 

 straight, short and narrow hypopygium. The females of 

 the group seem to be distinguished by a more or less 

 excavated pronotum and a rather narrow pygidium. 



Elaphroptera herlstii, Andre. 



Elaphroptera herlstii, Andre, Zeitsch, Hym. Dipt., 6, p. 

 308, n. 5, 1904, $. 



$ . Head very little more than half as long as broad, the posterior 

 angles slightly rounded ; eyes small and oval, divided by a little less 

 than their own length from the base of the mandibles. Head, thorax 

 and median segment sparsely punctured ; pronotum half as broad 

 again as long, the sides parallel, the anterior margin straight, deeply 

 and broadly depressed in the middle. Median segment sparsely 

 punctured at the base, where it is only half as wide as the pronotum, 

 short, obliquely truncate posteriorly and broadened to two-thirds of 

 the width of the pronotum, the surface of the truncation almost 

 smooth and slightly concave, with a strong median carina on the 

 apical half. Abdomen longer than the head and thorax, convex 

 above, flattened beneath, finely and shallowly punctured, broadest 

 at the third segment, which is nearly twice as wide as the pronotum ; 

 the apical margin of the basal segment feebly depressed ; the second 

 segment transversely rugose, the apical margin raised, smooth at the 



