on the CEstri and Cuterebra? of various Animals. \y h \ 



CESTRUS LlBYCUS. 



Cinereus, thorace punctis 4 alisque punctis 3 nigris. 



Habitat in iEgypto, D. Riippel. 



Descr. Mas magnitudine et statura fere (E. Ovis. Totum corpus cum capite cylindriformc 

 Fades magna, pars inferior cum antenna flavesceriti-alba ; vertice fusco, stnnmatibus 

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

 que punctis duobus pertusis atris, posterioribus elongatis. kcutelittm magnum, pine- 

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

 obtusum, argenteo-albidum, ad atera scabriusculum, punctis fuscis nonnullis elevatii 

 quasi respiratoriis ; subtus album. Pedes rufescentes, femoribus annulo unico, films 

 annulis duobus, nigris. Alee, albo-pellucidae, basi nigricantes, puncto feacitque trans- 

 versa flexuosa costae adnexa lineolaque, atris. 



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

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

 annexed. 



CEstrus Clarkii. 



Caerulescenti fuscus, alis obscuris antice sinuatis basin versus atro bipunc- 

 tatis. 



Habitat ad Caput Bona? Spei. W. E. Shuckard, monographus eel. Insectorum Hymcn- 

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



Descr. CEstro Ovis bis major. Fades nuda (uti totum corpus), lata, flavo-albida, antennia 

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

 dis. Thorax ratione abdominis grossus, oblongus, alis postice insertis. ScuteUttm 

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

 impressis quasi in tesseras profunde divisum, dorso in medio longitudinalitcr porcatum 

 seu linea assurgenti munitum. Femora vix compressa, nigra, geniculis tarsisque griscis. 

 Unguiculee 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, subtriquetrae. 



Conjicit amicissimus Shuckard hanc speciem inter pecoramajora 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 



