816 M. W. R. de V. GRAHAM 



damaged type female of transversus and stated it to be the same as dynastes Forster ; 

 in doing so he corrected his earlier view (1955a : 154) that it belonged to Dibrachys. 



Pteromalus dynastes Forster. Type material not seen (in Forster coll., Natur- 

 historisches Museum, Vienna) ; it was re-examined by Kurdjumov (1913). 



Pteromalus (Dibrachys) acutus Thomson. Syntypes, 2 $, 1 <£. LECTOTYPE 

 female labelled " L-d " [Lund] and " acutus Ths ". 



Note. Both P. dynastes Forster and P. acutus Thomson were erroneously placed 

 in synonymy with druso Walker by me (Graham, 19566 : 260). The type <$ of 

 druso was thought to belong to Dibrachoides , but in fact as I later realized it is a 

 male of Kranophorus extentus (Walker). Boucek (1965^ : 35) has pointed out my 

 error. 



Britain, Sweden, Germany, Czechoslovakia, Moldavian S.S.R. ; North 

 Africa (Morocco). 



Biology. D. dynastes was reared as a parasite of the larvae of the alfalfa-weevil, 

 Phytonomus posticus (Gyll.) (Col., Curculionidae) in Portici, Italy, then imported 

 into the U.S.A. during 1911-1912. These specimens were compared with Forster's 

 type by Kurdjumov (1913 : 12). The species has also been reared from Phytonomus 

 (=Hypera) nigrirostris (F.) and Ph. rumicis (L.), and has been mentioned in several 

 papers on economic entomology published in North America ; for a list of these see 

 Peck (1963). Imagines appear in the field in July and August (Europe). 



Dibrachoides cionobius sp. n. 



(Text-figs. 673-675) 



?. Head and thorax olive-green, with a coppery bronze tinge in part, particularly on the 

 mesoscutum and scutellum ; gaster mainly bronze, its first tergite mainly bright green. 

 Mandibles testaceous. Antennal scape and pedicellus testaceous, the latter darker above ; 

 flagellum brown, paler beneath. Coxae concolorous with the thorax ; rest of legs brownish 

 testaceous with the trochanters partly, the knees very narrowly, the tips of the tibiae broadly, 

 and the tarsi proximally, pale testaceous. Tegulae brownish testaceous. Wings hyaline, 

 venation testaceous. Length 2-4-2-5 mm. 



Head in dorsal view (Text-fig. 675) about twice as broad as long ; temples hardly half as 

 long as the eyes, converging moderately, their outline almost straight, posteriorly produced 

 to an acute point ; POL slightly greater than OOL. In front view the head is transversely 

 oval. Eyes ovate, about 1 -5 times as long as broad, their inner orbits diverging slightly ventrad. 

 Malar space about two fifths the length of an eye. Antenna (Text-fig. 673) with scape not 

 reaching the median ocellus ; combined length of pedicellus and flagellum about two thirds 

 the breadth of the head ; pedicellus fully as long as anelli plus first funicular segment, in dorsal 

 view about twice as long as broad ; first anellus short and strongly transverse, second somewhat 

 longer, though fully twice as broad as long, and hardly more than one-third the length of the 

 first funicular segment ; funicle stouter than the pedicellus, nearly cylindrical, all its segments, 

 except perhaps the first, very slightly transverse ; clava hardly broader than the funicle, about 

 1 -75 times as long as broad, nearly as long as the three preceding funicular segments together ; 

 sensilla fairly numerous except on the proximal funicular segments. 



Thorax like that of dynastes (Forster) female, but rather more squat, length : breadth 

 viewed dorsally about 1-35 : 1, with the mesoscutum a little more strongly transverse, slightly 

 more than twice as broad as long ; median area of propodeum more shiny, its sculpture less 



