4 F. D. Morice. 



24. Rhynchium sirdari Morice n. sp. 1 One d% Khartum 31 i. 

 Colore omnino ut synagroides, sed structura alia. Clypeus 



semicirculariter emarginatus, angulis apicalibus spiniformibus, 

 longitudine sua evidenter latior. Mandibulse validse, latse, minus 

 quam in synagroide elongatse; margine apicali dentibus 2 in medio 

 instructo, contiguis quidem sed bene distinctis, quorum exterior 

 interiore duplo longior. Postscutellum, a latere visum, acute 

 conicum: area huius basalis vel horizontalis brevis, crasse punc- 

 tata, et in medio carina alta longitudinali, vel dente compresso, 

 armata. Abdominis segment! secundi pars ventralis, ut in syna- 

 groide. basi subtuberculata; sed disco laeviore, punctis sparsis, 

 magnis quidem sed minime profundis. — Long. circ. 26 mill. 



The semicircularly emarginated clypeus, with its long spine- 

 like angles, at once distinguishes this species from aniens & as 

 described by De Saussure, and also from specimens called abysm 

 nieum tf in the South Kensington Museum, which (like abysm 

 nieum ?) have a subtruncate clypeus. From synagroides <? it 

 differs in having the clypeus evidently wider than long, the 

 mandibles stouter, and the teeth on their apical margin better 

 developed. Also in synagroides the ventral surface of the second 

 abdominal segment is far more strongly and deeply punctured. 

 There is no male called ardens at South Kensington, and only one 

 female, which is exceedingly unlike sirdari in having its clypeus 

 particularly narrow and elongate, with a subtruncate apex. 



In sirdari (at least, in the specimen before me) the orange 

 colour extends from the apex of the abdomen to beyond the apex 

 of the third segment, whereas De Saussure describes that seg- 

 ment as "black" simply, alike in synagroides, abyssinieam and 

 ardens; but this is probably a variable character, and might 

 appear in any of the species in question. 



25. Odynerus ('?Ancistrocerus) aberraticus Morice n. sp. Three 

 <?c?, Abba Island 12 ii. 



Antennarum apices uncinato-reflexi. Abdominis segmentum 

 l um basin versus fortissime transverse cristatum; valde petioli- 

 forme — scilicet longissimum, apicem versus lenissime dilatatum, 



1 The new species of this paper were described in a preliminary noM 

 • X'\\ Hymenoptera aculeata etc." in Annals and Magazine of Natural History 

 S.t. 7. Vol. xii. Dec. 1903. 



