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XXXII. Descriptions of some new Species of Diorsis. By J. O. Westwoon, Esq., 
F.L.S., &c. 
Read November 3rd, 1835. 
7 HAVING since the publication of my monograph upon the Dipterous genus 
Diopsis in the 2nd part of the 17th volume of the Transactions of the Linnean 
Society, met with some new species of that remarkable genus in several of the* 
Continental cabinets which I have recently examined, I beg leave to offer the 
descriptions of them to the Linnean Society by way of supplement to my mo- 
nograph. 
Species ad Sectionem primam pertinentes. 
Species 22. (vel 1a.). Diopsts WIEDEMANNI, mihi. 
Tas. XXVIII. Fig. 1. 
D. capite medioque abdominis rufescentibus, thorace nigro, spinis 2 scutella- 
ribus et 4 thoracicis flavidis, alis fuscescentibus in medio obscurioribus 
maculá ante apicem sublunari. 
Long. corp. lin. 4. 
Habitat in Guined Africze. In Mus. Wiedemann. 
Magnitudine et affinitate D. Ichneumonee proxima, à quà autem differt alis 
fuscescentibus, abdominis basi nigrà thoraceque 4-spinoso. E pedunculis 
oculiferis abdomineque haud clavato insectum masculinum indicatur. 
Caput rubrum, os versus attenuatum, et utrinque spina acuta perpendiculari 
armatum, pedunculi oculiferi graciles, thorace paulló longiores. Thorax 
niger, collari nitido, scutelloque concolori; spine 2 scutellares elongate, 
2 mesothoracicz et 2 metathoracice abbreviate, flavae. Abdomen elon- 
gatum haud clavatum, sensim ultra medium latius, basi nigra, medio rufo 
apiceque rufescenti-fusco. Pedes rufescentes, femoribus anticis incrassa- 
tis, posticis 4, ad apicem 1-subspinosis ; tibiis anticis subtüs obscurioribus. 
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