6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 134 
the hemolymph of various insects, hemocytes resembling in their 
cytological characters the fragile corpuscles involved in the other 
patterns do not visibly alter. They appear as large, pale vesicles in 
which a few dark particles are scattered. In several insects these 
elements are the remnants of darker refractile hyaline hemocytes, 
which undergo clarification after explosive discharge of a part of 
their cytoplasm. In the vicinity of these inert or altered hyaline hemo- 
cytes no change can be detected under the phase-contrast microscope 
in the consistency of the plasma, which remains permanently fluid. 
DISTRIBUTION OF THE PATTERNS OF COAGULATION IN THE DIFFERENT 
GROUPS OF INSECTS INVESTIGATED 
In the table below, the names of the species are followed by the 
numbers of specimens studied (adults, unless otherwise stated) and 
by the patterns of coagulation provisionally found predominant or 
representative on the basis of the microscopical study of several 
samples of hemolymph obtained from these specimens. Incidental 
findings of other patterns are also reported under “Comments.” 
In several taxonomic groups, the average pattern recorded on cor- 
responding material from the Old World previously studied (Grég- 
ire, 1955a; Grégoire and Jolivet, unpublished) follows the list of the 
Neotropical material in the table. 
The patterns of coagulation described above have been represented 
in the table by the following symbols: 
@: pattern I: inception of the plasma coagulation in the shape of 
islands of coagulation around hyaline hemocytes. 
©: pattern II: development of cytoplasmic meshworks by hyaline 
hemocytes. Reaction in the plasma in the shape of veils. 
@-: pattern II: incomplete. Emission of cytoplasmic expansions, 
characterizing the reactions of the hyaline hemocytes in pat- 
tern II, but unaccompanied by formation of veils in plasma. 
@: pattern III: patterns I and II combined. 
—: pattern IV: no visible coagulation. 
( ): pattern incidentally or exceptionally recorded in limited fields 
of preparations exhibiting predominantly another pattern. 
(?): microscopical characters of a pattern not clear-cut or equivocal. 
Other abbreviations used: sp., species; spm., specimen. 
Gradations in the intensity of the reactions, especially with regard 
to pattern I, are indicated by the following symbols: I poor (scarce 
fringes of clotted plasma around the altered hyaline hemocytes, with- 
