on the CEstri and Cuterebrse of various Animals. 93 



CESTRUS LiBYCUS. 



Cinereus, thorace punctis 4 alisque punctis 3 nigris. 



Habitat in ^gypto, D. Riippel. 



Descr. Mas magnitudine et statura fere (E. Ovis. Totum corpics cum capite cylindriforme. 

 Fades magna, pars inferior cum antennis flavescenti-alba ; vertice fusco, stemmatibus 

 3 nigris. Oculi rufescentes, majores. Thorax cinereus, antice foveola impressus, utrin- 

 que punctis duobus pertusis atris, posterioribus elongatis. Scutellum magnum, cine- 

 reum, lateribus nigro inquinatum, atomisque duobus mediis nigris. Abdomen breve, 

 obtusum, argenteo-albidum, ad atera scabriusculum, punctis fuscis nonnuUis elevatis 

 quasi respiratoriis ; subtds album. Pedes rufescentes, femoribus annulo unico, tibiis 

 annulis duobus, nigris. Ales albo-pellucidae, basi nigricantes, puncto fasciaque trans- 

 versa flexuosa costae adnexa lineolaque, atris. 



For the following remarkable species I am indebted to my amiable friend 

 Mr. W. E. Shuekard, who obligingly presented it with the name also kindly 

 annexed, 



CEsTRUs Clarkii. 



Cserulescenti-fiiscus, alls obscuris antice sinuatis basin versus atro bipunc- 

 tatis. 



Habitat ad Caput Bonse Spei. W. E. Shuekard, monographus eel. Insectorum Hymen- 

 opterorum, qui, una cum nomine triviali, lubentissime mihi communicavit. 



Pescr. (Estro Ovis bis major. Fades nuda (uti totum corpus), lata, flavo-albida, antennis 

 alte immersis nigris ; oculi grisei ; vertex fuscus, punctis duobus parvulis nigris luci- 

 dis. TKorax ratione abdominis grossus, oblongus, alis postice insertis. Scutellum 

 majusculum, dorso canaliculatum. Abdomen fusco-caeruleum, breve, ovatum, ex Uneis 

 irnpressis quasi in tesseras profunde divisum, dorso in medio longitudinaliter porcatum 

 seu linea assurgenti munitum. Femora vix compressa, nigra, genicuUs tarsisque griseis. 

 Unguicula valde divergentes, incurvae, membranulis duabus interpositis. Ala fuscae, ad 

 costam retro sinuatae, macula punctoque baseos atris distinctissimis, alteroque minimo 

 in ipsa costa. Halteres flavo-lacteae, tumidae, majores, subtriquetree. 



Conjicit amicissimus Shuekard banc speciem inter pecora majora Capensia habitasse. 



I may here remark, that my kind friends have three times endeavoured to 

 connect my name with an insect, and twice has it been proved to be nuga- 

 tory by my own researches. The first was by my friend Jurine, at Geneva, 

 .attaching my name to a splendid Tenthredo, found by me near Orbe, This I 



