Dr. Heineken’s Description of Cerascopus. 37 
a constriction and depression just before the second pair of legs: 
posterior division elongate and irregular in figure and surface, im conse- 
quence of the articulations of the legs; anterior rather linear and 
giving origin to the raptorious legs at its anterior extremity. Tarsi of 
the latter gradually and finely pointed, and slightly curved inwards, and 
together with the tibie received into a groove between two rows of spines 
and a strong prominent curved spur at their termination on the thighs. 
Second joint of the tarsi of the other legs shortest, and third longest. 
Three joints in all, with two curved, simple, exserted terminal claws. 
Genitalia 2 in statu quiescente adeo compressa ut vix investigari 
queant ; nec in coitu observare contigit. 
Genitalia 3 distincta, extantia, antrorsum sursumque flexa. Penis 
membranaceus, pellucidus, truncatus, inter crura prehensorum (quorum 
duo laterales appositi, alter inferior posticus) exsertus. De cottu, 
semel tantum viso, tam ob brevissimum spatium temporis quo peractum 
est, quam ob difficilem observandi rationem (insectis vase vitreo inclusis), 
hee tantum quoad partes observata sunt: scilicet, cruribus prehensorum 
expansis vel divaricantibus, penem deinde extensum fuisse; interea, pedi- 
bus raptoriis feminze utrisque ab alterutro maris comprehensis, thoracem 
ejus amplexus corpusque incurvans, coitur. Alio tempore fefellit marem 
spes pedes raptorios femine comprehendendi; illa itaque evasit. 
Illaquidem semper invita, idcirco nonnihil periculirespicere marem videtur; 
quippe post coitum sese invicem vitant, nec (ut semel ambobus in vase 
relictis) aliquando femina marem necare recusat. Coitum cum femina 
gravida semel a mare inceptum vidi, sed infelici casu: ex hoc patet, 
marem nisi experiendo femine affectus nescire. Quarta circiter hebdo- 
mada post coitum, 2 ponit ova, ovalia, albida, pellucida, vasi adhereéntia, 
dispersa, numero incerta, larvis decimam post diem exclusis: impregna- 
tione una ad tres quatuorve ovorum depositiones sufficiente. Meta- 
morphosis nulla aut valdé indistincta. 
The insect is found from March to December (seldom if ever during 
the intermediate months) stalking on the walls of rooms, and almost 
invariably after dusk; those in confinement are more or less torpid 
during the day. The motion when the pace is quickened, or when about 
to take prey, is more elastic and librating (if the term be allowable) than 
tremulous and vibratory, so that it cannot be strictly called tipulous; it 
