some allied Genera of Hymenopterous Insects. 269 



Megalyra, Westw. 

 Corpus cylindriciim, fere parallelnni. Caput thoracis liitiuidine 

 fere globosum (PL XV. fig. 2a, caput $, ex latere visum; 

 fig. 3 b, facies $ ; fig. 3e, caput et thorax 5). Ocelli inter 

 oculos positi ; antenna; versus os (sub carinam semicircularem 

 clypeum cingentem) insertae. Labrurn breve, triangulare, 

 setdsura. Mandlbulce breves, crassae, corneae, apice acutse, 

 dentibusque duobus internis aiqualibus intus apicem armatae. 

 Maxillde lobis duobis apicahbus margine membranaceo. Palpi 

 maxillares 5-articulati ; Imo brevissimo, 2do et 3tio brevibus, 

 obconicis ; 4to et 5to longis, gracilibus. Mentum angustum, 

 corneum, semitubulosum. Labium membranaceum, ovatum. 

 Palpi labiales articulis 3us fere cequahbus (fig. 3f, maxilla 

 et labium in situ). Antennce gracillimae, in utroque sexu 

 14-articulatse. Prothorax minutus, in collum baud productum. 

 Mesothorax margine antico truncato et ad marginem posticum 

 capitis applicato. Mesoscutum fere quadratum. Scutellum 

 magnum. Metathorax parte antica thoracis vix angustior, 

 apice truncatus, lined media in duas partes divisus. Abdomen 

 subsessile (petiolo nullo) in apicem metathoracis insertum, 

 oblongo-ovatum (fig. 3d $), fere thoracis latitudine. Oviduclus 

 longissimus (fig. SjO-, apex abdominis 5 infra; 3/<, lateraliter 

 visus ; 3 A-, apex terebrae lateraliter ; 3/, supra visus). Al(S 

 anticae vena postcostali e costa remota, stigmate inconspicuo, 

 areola un4 marginali, duabus submarginalibus, vena trans- 

 versa has separantibus indistincta (venis longitudinalibus in 

 parte colorata multo crassioribus (fig. 3i)\ vend unica obliqua 

 in alis posticis). Pedes longitudine raediocres, feuioribus 

 parum crassioribus, tibiis tarsisque simplicibus, illis apice 

 ecalcaratis in pedibus 4 posticis ; his articulo 4to subtus 

 setoso (fig. 3vi). Ungues simplices, pulvillus parvus. 

 In this genus we have a still greater departure from the assigned 

 character of the family, the abdomen being implanted upon the 

 thorax in the ordinary position. We find, however, the broad 

 toothed mandibles, the 14-jointed antennae, the distinct costal cell 

 of the fore wings, and the indistinct veining of the hind wings, 

 which we have seen to be the predominating characteristics of the 

 family, whilst the number of the articulations of the palpi corre- 

 spond with those of Pelecinus, 



The only known species of this curious genus is an inhabitant 

 of New Holland.* 



* [P.S. Mr. Shuckard now possesses a second and larger species of the genus 

 from the same country.] 



VOL. III. u 



