NO. 6 HEMOLYMPH COAGULATION IN INSECTS—GREGOIRE 35 
EXPLANATION OF PLATE 1 
Films of hemolymph spread out between slide and coverglass, immediately 
upon shedding from severed appendages. Phase-contrast microscope (Wild 
M/to). Scale: 20 microns. 
Figs. 1 and 2. Stenodontes (Mallodon) molarius Bates (Cerambycidae, Pri- 
oninae). (Pattern I***: very substantial coagulation.) All the hyaline 
hemocytes are surrounded by islands of coagulation. Considerable ex- 
tension of the granular coagulum. In figure 1, three elements belonging 
to other categories of hemocytes are passively embedded in the clot. 
Figs. 3, 4, 5. Paraponera clavata (Fabricius) (Formicidae). (Pattern I ***). 
Islands of coagulation of small size. Extension of the coagulum. In 
figure 3, a small hyaline hemocyte (on the right) in the center of a small 
island of coagulation. On the left, two granular corpuscles embedded in 
the clot. 
Fig. 6. Cetoninae sp. (Scarabaeidae). (Pattern II). Typical reaction of the 
hemolymph in vitro, as it appears in several subfamilies of this group (see 
table). Many hyaline hemocytes of small size with their cytoplasmic 
expansions are embedded in a substantial veil. Identical pictures were ob- 
served in several species listed in the table, especially in Lagochile, Pelid- 
nota, Phalangogonia, Trizogeniates, Aspidolea, Cyclocephala, and Dys- 
cinetus. 
Fig. 7. Phrictus quinquepartitus Distant (Homoptera, Fulgoridae). (Pattern 
[***), Two hyaline hemocytes, each surrounded by an island of coagula- 
tion. Considerable extension of the coagulum between the islands, which 
preserve their size and shape. 
Fig. 8. Pseudophyllidae (Tettigoniidae). Larva, first stage, male (Pattern I). 
The process of coagulation was slow and developed poorly in this specimen. 
When the picture was recorded, no reaction had yet developed in the plasma 
around the hyaline hemocyte shown in the center, between two other blood 
elements, including a granular hemocyte. 
Fig. 9. Tenebrionidae sp. Picture representative of pattern III, predominant in 
this family (see description of the coagulation in Zophobas latticollis 
Kraatz, in the text, p. 27). Fan-shaped disposition of the threadlike cyto- 
plasmic expansions of hyaline hemocytes, diverging from an air bubble on 
which these highly adhesive structures are anchored. Plasma reaction in 
the shape of a veil, with denser areas around hyaline hemocytes, correspond- 
ing to islands of coagulation. (Compare with Grégoire, 1055a, figs. II 
and 20. See legend of text figs. 2 and 3.) 
