512 ANSWERS TO CORRESPONDENTS. 
being’ sent him under charge of his son. It is rival 
purpose to go southward and discover the outlet to the great 
basin of the Tanganyika, extending from about 3° to 10° 5. lat 
and 27° to 39° E. long., which he had discovered, and oan 
on all sides except the sortlesinat cits 
ANSWERS TO CORRESPONDENTS. 
F. C. H., Yell ed Springs, i o.— It is not at all improbable that some Tachina. 
site infests Coreus tristis De Geer. Itis well an that beetles in the i Gua a 
sometimes i parasitized, te we have bred a smë ne Tachina-jly from cui 
cea Fabr. ee also AMER. NaT.,Vol. V, p.217. We should like specimens from 
iristis is iy 
Mrs. P. H, New Haven. ee ere cimens of insects you sent to the NATURALIST, 
Whiok ro found i in such nu s on May 20th, are doubtless the T 
deman (order Neuroptera), mi rt e called the American white 
females ae — and wingless. The males, which are mostly blac: 
in May and June and for a few days are often seen in countles 
live in pa hey decaying w Life only, and doubtless found a congenial home 
doorstep mentioned. — : 
BOOKS RECEIVE}. 
Proceedings of the California Academy of Science. Vol. iv, Pt. iv, 1871. supe 
Recti Senpai of ak ai Fada * paki sis of ‘tha pomi oe Naiades of Nor : 
Tsaac Lea. as New Edition. /Philadel phia. 1572. 2 “ending 180. 
Ee of ihe intomologica Society of the Province of Ontario, for the yea j 
na and portions f 
Hayde Unites 
Jun poan J. G 
a, etc. By T. M. B, Cross, M.D. Svo 
ew Species of F 5 isfrom the vicinity y Ber tite 
ections of D James Knapp g ville. BY 
p: May, i: 
ypotheses, By F.J. Finois. Paka “pam „ Dp. 82 
panes 
Nes Silicon Steel, 8vo pamph, Benet he 
MS conga ws Report of the Boston Society 7 Farai aliari ti 
sto: 
Remarks on ‘the Nomenclature of Achromatic Objectives for the Com ompo ung er 
Oy Diodes abies ward, U.S.A. 8vo pamph. (from the American Journal 
une, 1870. 
On Reversi samong the Ammonites. By Prof. A. Hyatt. Svo pape, te 
Catalogue p7 Tig ata By see Hyatt. Svo pa p t 
Nat. Hist., May 
Monograp. e da dprsepne de 
yy des “Annals of t 
oe 
r s aT of mand 
wisiana ye sversity 
e 
Saage the Bost. KOC. 
War Depa 
ach. 
of Louisvill lle, Ky. Erom : 
ae re (oara none fo : 
e America; roy ‘dournal 
y Third Series, July 2, coy tiny 
Taa Nos, for June a Aaly. 1872. ‘London. 
ia ne and duly, 1872, 
The Field. No. for July, 1872, London. 
po he Torrey B 
iiie s i June, ar 
Journal of Botany. 
London. 
