474: MODERN CLASSIFICATION OF INSECTS. 
cularly elevated and curiously tubercled, extending considerably over 
the back. In Diaspidius Scapha Westw. (in Drury, 2d. edit.) the pro- 
thorax is flatter, and extends behind in the place of a scutellum. The 
curious forms of Arilus serratus* (and several allied species) and 
Emesa + have been already noticed. In Hammatocerus (C. perspicil- 
laris Drury), the second joint of the antenne consists of a number of 
minute articulations quite unlike any other insect in the whole order. ¢ 
In my exotic genus, Enicocephalus, consisting of minute species, the 
head appears to consist of two distinct heads, the posterior being globu- 
lar, and furnished with the ocelli; and the prothorax is divided into 
three distinct transverse lobes, so that the front of the body seems to 
consist of pieces improperly united together; the structure of the fore 
legs is also remarkable. (See my Monogr. on this g. in Trans. Ent. Soc. 
vol. ii. p. 23. pl. 2. £8.) Holoptilus Serville (Ptilocerus Gray) is re- 
markable for the brushes of very long hair upon the antenne and legs. 
Ihave also presented a monograph of this anomalous genus to the 
Entomol. Soc. The larva of H. Lemur W. (Australia) exhibits the 
curious structure of the antenne and hind legs of the imago. 
The seventh family, C1mictp# §, is here restricted to the genus 
comprising the bed-bug (fig. 121. 1.), for which the name of Cimex 
* I possess the pupa of this species, which has the back of the prothorax merely 
slightly elevated without any serration. 
+ Mr. M‘Leay has informed me that he found the large Emesa filum in Cuba 
under stones. 
Heineken (Zool. Journ., No. 16. p. 426.) has given the details of an interesting 
experiment he made with a species of Reduvius inhabiting Madeira relative to the 
reproduction of mutilated limbs. On the 8th of August he divided both antennz 
of a pupathrough the basal joint: — ‘“ Sept. 4. Reproduced, at the same time, 
moulting into a perfect insect. They are of unequal lengths, thicker and shorter 
than the original ones, and, as far as I can ascertain, having only three instead of 
four joints. —Oct.10. Died from want of proper food, the antennz still unequal and 
imperfect. It had not moulted again !” 
¢ The same character is visible in a pupa of this insect, collected by Mr. Double- 
day in America. 
§ Breviocr. Rerer. To THE CrmIcip&. 
Southall. A Treatise on Bugs. 8vo. Lond. 1730.; Hamb. 1737.3; Berl. 1742. 
n. ed. 1798. 
Carlson, in Vetensk Acad. Handl. 1789. (Cimex lectularius). . 
Jenyns, in Annals of Nat. Hist., No. 17. June 1839. (3 n. sp. Cimex ) 
