Ld 
MONOGRAPH OF THE DORYLIDES. 79 
Species I.—Enictus ambiguus, Shk. (Mon. Dor. p. 24).  Rufo-testaceus, pubescens, 
capite (anteanis mandibulisque exceptis) et thorace nigro, mandibulis longissimis ; facie 
carina media subtus furcata, alarum venis stigmateque fuscis, pedunculo profunde cana- 
liculato. Long. corp. fere lin. 4. Expans, alar. lin. 74. (PI. 20, fig. C., head.) 
Habitat India Orientali, Poonah. In Mus. Sykes, Saunders, et Westw. 
Species I].— Ainictus certus, W. Rufo-fulvescens, pubescens, capite brunneo-nigro, mandi- 
bulis sub-brevibus, stigmate alarum fusco, venis fulvo-fuscis, pedunculo antice angustiori, 
disco subplano. Long. corp. (abdom. incury.) lin. 33. Expans. alar. lin. 74. 
Habitat? In Mus. Soc. Linn. Lond. 
Head pitchy or brunneous black, the face redder brown; the antenne fulvous, with long 
slender hairs; mandibles short, faleate, and fulvous. The thorax is fulvous, finely setose. 
The abdominal peduncle is somewhat triangular; the sides rather rounded, and the posterior 
angles not acute ;the sides are slightly elevated, and the disk is nearly flat and not channelled 
in the middle; the second, third, and fourth segments of the abdomen are of nearly equal size, 
the fifth is much longer than either of these segments, the sixth is much shorter, and the 
seventh is about as long as the sixth. The male organs are concealed. The wings are 
throughout more stained with a light fulvous tint than in Aun. ambiguus. The stigma is 
fulvous, and the veins are fulvous-brown. There is considerable difference in the position of 
these veins in the two known species. ‘The cubital vein arises very near the postcostal in Ain. 
certus, but at a distance from it in AS. ambiguus, in consequence of which the first cubital cell 
is smaller than the second discoidal cell in the former, whereas they are of equal size in the 
latter; this is further increased by the vein which separates the first and second discoidal cells 
being deflexed at its extremity in /E. certus, whereas it is straight in Ain. ambiguus, termi- 
nating at a greater distance from the extremity of the anal vein ; moreover the transverse veins 
which close the extremity of the cubital and discoidal cells are much more angulated in 
in, ambiguus than they are in A®n. certus. 
Doryuus, Fabr. 
The species of this genus are confined to Africa and Asia. 
They are distinguished by possessing very short feet, with com- 
pressed femora, two submarginal cells, and only one recurrent vein 
in the fore wings. 
A.—Peduncle cup-shaped, nearly as large as the following segment. 
Species I.—Dorylus nigricans, Uliger (Fabr. Shk. Mon. Dor. p. 28). Nigricans, brunneo- 
holosericeus, capite magno, abdominis petiolo acetabuliformi, segmento 2do paullo 
minori, oculis minutis. Long. corp. lin. 13. Expans, alar. lin. 214. 
Inhabits Sierra Leone. 
B.—Peduncle cup-shaped, much smaller than the second segment. 
Specirs 1.—Dorylus helvolus, Linneus, &c. (Shk. Mon. Dor. p. 29). Helvolus pilosus ; 
capite rufo, facie opalina convexa, petiolo acetabuliformi, 2do segmento multo minori. 
Long. corp. lin. 125. Expans. alar. lin. 214. 
Inhabits the Cape of Good Hope. 
Species I1].—Dorylus affinis, Shk. (Mon. Dor. p. 30). Helvolus pilosus ; capite rufo- 
castaneo ; facie plana, petiolo acetabuliformi, 2do segmento multo minori. Long. corp. 
lin. 103. Expans. alar, lin. 19. 
Inhabits the vicinity of the river Gambia. Differs from the preceding in its smaller size, in 
the cubital nervure being slightly undulated (instead of straight), as far as the separation 
of the two’ submarginal cells and the recurrent nervure, inserted at fully one-half of the 
length of the first of the latter. 
C.—Peduncle quadrate, mandibles slender and much acuminated, 
Sprcies I1V.—Dorylus glabratus, Shk. (Mon. Dor. p. 31). Rufo-brunneus, glaber, sub- 
robustus, venis alarum nigris, vertice valde prominente. facie in medio sulcata, mandibulis 
attenuatis, labro tuberculis binis obtusis instructo et pedunculo abdominis transverso- 
quadrato. Long. corp. lin. 143. Expans. alar. lin. 233. 
Inhabits the vicinity of the river Gambia. 
