152 Mr. E. E. Austen on Cutiterebra. 
“ Atrow.—Cut. atra, glabra, abdomine caerulescenti-atro marginibus 
segmentorum albis. 
‘“‘ Habitasse creditur in Africé*, v. fig.5. Ex Museo D. West- 
wood. 
‘“ Descr. Facilé inter maximas hujus generis omnino atro 
caerulescens, lucidus. Thorax anticé scabriusculus, posticée 
glaber. Halteres scutellum circumcingentes, erectae, maximae. 
Alae parim puculatae (ste), obscuré aurulento, fuliginosae. Abdo- 
men latum, obtusum, incurvatum, atro caeruleum incisurarum 
marginibus, albis. Ad latera et subtus albo late conspersum. 
Pedes atri geniculis tibiarum extus albicantibus.” 
It will have been observed that in both the above deserip- 
tions Clark writes * halteres ”’ for ‘ alule.’’ 
Cutiterebra fontinella, Clark. 
Cuterebra fontinella, Clark, Trans. Linn. Soc. xv. pp. 410, 411 (1827) ; 
Clark, Essay on the Bots of Horses and other Animals, pl. ii. fig. 23 
(1815) [figure only]; Brauer, Monographie der Cistriden, p. 242 
(1863) [translation of Clark’s description]; (nec Townsend, Insect- 
Life, v. pp. 319,520, 1893); Austen, Ann. & Mag. Nat. Hist. ser. 6, 
vol. xv. pp. 884-886 (1895) | Cutiterebra], 
Cuterebra fontanella, Clark, Trans, Linn. Soe. xix. p. 88 (1845). 
Cuterebra americana, Walker (nec Fabricius), List Dipt. &c. iii. p. 683 
(1849). 
The library of the Zoological Department of the British 
Museum contains two copies of Clark’s ‘ Essay on the Bots 
of Horses &c.,”’ one with coloured, the other with uncoloured 
plates. The uncoloured copy contains two figures that are 
not included in the plates in the other, namely fig. 40, pl. i. 
and fig. 23, pl. 1.¢ On turning to the Oxtord copy of the 
* Westwood has struck out “ Habitasse creditur in Afric&é” in the 
Oxford copy, and wiitten ‘‘[ Habitat certe in Mexico. J. O. W.]” in the 
margin. As was stated in my former paper, Cutzterebra is confined to 
the Nearctic and Neotropical Regions. Prof. Brauer, in his Monograph, 
merely translates the descriptions of atror and detrudator, as he did not 
know the species ; but he gives the patria of atrox as “ Mexico,” and 
writes “Vaterland?” in place of that of detrudator, thus apparently 
having been informed of Westwood’s emendations mentioned above. 
However, he goes on to state with reference to C. detrudator (p. 245) :— 
“Clark vermuthet wohl irrthiimlich, dass die Art aus Afrika stamme. 
Finer Mittheilung Westwood’s zufolge hat Clark die Angaben iiber das 
Vorkommen bei dieser Art und der Cut. atrox verwechselt.” But in 
applying Clark’s statement as to the locality of C. atroa to C. detrudator 
Brauer himself has blundered. The type of atroa is labelled “ Mexico,” 
but that of detrudator bears no locality, unless it be an illegible word to 
which a note of interrogation is prefixed. 
+ Bracy Clark seems to have had a weakness for republishing his 
papers with alterations in the figures; cf. the instance of the figures to 
his “ Note on the Bot infesting the Stag,” mentioned in the remarks on 
the “ Addenda 1848” above. 
