SYSTEM OF INSECTS. 415 
regard to the Hymenoptera and Diptera the analogy is 
undisputed, and must strike every beholder; and one 
would almost say it was a real affinity, were it not that 
the resemblance is not only general between Order and 
Order, but that almost every Hymenopierous tribe has 
its counterpart amongst the Diptera; the saw-flies? 
for instance, the ichneumons, the various false-wasps, 
the false-bees*, the bees, the humble-bees, the ants, 
&c., severally find there a representative that wears 
its livery and general aspect: a circumstance which 
evidently proves that it was part of the plan of the 
CreaTortoplace them in contrast with eachother. Were 
I to pursue this subject further, it might not be difficult 
to show that were the tribes of Mandibulata or of Haus- 
tellata also arranged in columns, analogies would be dis- 
coverable between their corresponding points: this 
seems to be Mr. MacLeay’s opinion’; and it is worth 
your pursuing the subject further, which cannot but 
prove very interesting. 
But though the general analogy of these columns is 
that of Order to Order, yet individual species in each 
Order sometimes find their representatives in a different 
one from that with which they generally are contrasted ; 
—thus some Dipéera, as Culex, by the scales on the veins 
and other parts of their wings, are analogous to Lep7- 
doptera rather than Hymenoptera ; as is also the genus 
Psychoda Latr. by its form. 
We come now to the consideration of a question not 
* Meigen has figured a Dipterous insect exactly resembling a Cim- 
bex ; but not having his work, I cannot refer to the plate. 
> Predones Latr., &c. © Andrena F., &c. 
4 Hor. Entomolog. 437. * Vow. UI. p. 645. 
