1918. | | BASHAMBAR Das: The Aphididae of Lahore. 157 
Systematic.—The two insects, otherwise from their structural anatomy, are quite 
distinct from each other. The colour, antennae, sensoria and stigma of wing, etc., 
are different in the two species. 
As no species of Pemphigus is recorded from Cynodon (vide Patch, Host Index of 
World’s Aphidae, 1913) I have provisionally named it Pemphigus cynodonti. 
The generic position has been discussed above in connection with Pemphigus 
aedtficator. 
Genus MACROSIPHUM (Pass.). 
(= Stphonophora, Koch). 
This genus, and as a matter of fact the entire family, has its home in temperate 
regions where it is numerically best developed. In the tropical and subtropical plains 
of India it is rather sparsely represented although the Himalayas harbour a very 
large number. 
Leaving out of account the hill forms a short identification table for the few 
species from the plains is given below :— 
A. Colour (including body) green. B. Colour red brown or chestnut. 
|(i) Body surface | (ii) Body very shin- 
I. Cornicles green. II. Cornicles black. | dull. ing. 
| Cornicles very Cornicles short 
Cornicles some- | (i) Apterous female (ii) Apterous female long, twice the and  conical, 
what curved. | ovate or oval; | long oval, al- length of cauda. subequal with 
Antennae black | short and coni- | most linear. | Hosts Sonchus cauda. 
at joints. cal. ' Cornicles long SPP. Hosts Garden 
Hosts mostly Le- Hosts Graminous and cylindri- | Chrysanthe- 
guminous plants.| plants. cal. LA mums. 
| Hosts Rosa spp. 
(I) Macros. pist le) Macros. grana- (3) Macros. rosei- | (4) Macros. solida- | (5) Macros. san- 
(Kalt.) rium (Kirby). formis, n.sp. | ginis, Fabr. borni (Gillette). 
With the possible exception of No.4 (see below) all of them are pests of econo- 
mic importance; short accounts of them have been prepared separately in the follow- 
ing pages. 
Macrosiphum pisi (Kalt.). 
“Green dolphin ’’ (English). 
- ‘‘ Green Pea Louse’’ (American). 
Syn.—Siphonophora pisi (Koch. Buck.). 
Nectarophora destructor (Johnston). 
Plenty of literature exists on this notorious insect. Several papers by Messrs. 
Johnston, Sanderson and Chittenden have appeared on the control and remedial 
measures against this destructive pest of peas in America (Circulars and Bulletins of 
U.S. Dept. of Agr., 1908-1909). 
Gillette has figured the antennae and cornicles in the Jour. Econ. Entom., vol. 
VC.) 3843, LOTT. 
Theobald gives figures, description and a fairly complete bibliography with a list 
of synonyms (Jour. Econ. Biol., Sept. 1913, p. 134). 
