242 MONOGRAPH OF THE LABOULBENIACE^. 
orders other than Coleoptera are doubtless largely represented. This is indicated by 
the fact that two among the small number of tropical forms at present known occur 
on such peculiar and unusual hosts as those of Lahoulhenia anniUar'is and L. Ilageni, the 
one a mite, the other a white ant. Southern California also furnishes an instance of 
the occurrence of a peculiar form on a host^ ChilocoruSj quite unrelated to any of tlie 
usual genera of insects thus parasitized, and it must be remembered that the Diptera 
have hardly been examined at all in this respect. It thus seems not improbabloj in 
view of the above facts, and of the more favorable conditions for development and 
perpetuation which exist in the warmer regions of the earth, that we may look to them 
■ 
for a large, if not the largest, future addition to the group ; for that the family is des- 
tined to be greatly augmented can hardly be doubted. 
Including a small number of forms not enumerated in the succeed nig pages, from 
lack of proper material for description, the total number of Laboulbeniacea? known at 
present to exist includes one hundred and fifty-eight species, from which five perhaps 
nn'ght well be deducted as synonyms, distributed among thirty genera, three of which 
are undoscribed. Of these one hundred and thirteen are, so far as known, confined 
to North America, eleven to Europe, eight to Africa, three each to Asia and South 
America, including Panama, while two are peculiar to Australia. On the other hand, 
nine are common to North America and Europe ; two to North and South America ; 
one to North America, Europe, Asia, and probably to Africa ; one, the determination 
of which is perhaps doubtful, to North America, South America and Africa, including 
JMadngascar ; one to South America and Africa; one to North America, Europe and 
probably to Asia ; and, lastly, one to Africa and Asia (Japan). 
Turning to the genera, one finds that of the twenty-five which are known in 
North America, twenty are not recorded from other continents; that of the six 
genera known in Europe, two have not been found elsewhere ; that of four genera 
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from Africa, two are indigenous; while of the two Asiatic 
Qv...^x.v, ^..^ IS con- 
fined to that continent. Lastly, South America and Australia are each known to 
possess but the single genus Laboulbenia, which is universally distributed. 
It is needless to remark that these 
value as showing 
distribution of the species and genera in the several continents, and 
they are merely given to indicate the possibilities of distribution in so fa 
perfect knowledge will permit. For convenience of reference a table giv 
detail the facts of relative distribution outlined above is here appended 
more 
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