308 THE AMERICAN NATURALIST. | [Vor. XXXIX. 
Both eye-rows not so strongly procurved 4. 
4. A. M. E. much larger than any other eyes ; ol of M. E. as 
broad below as above . Coras. 
A. M. E. not larger than adir eyes; EE EN usually narrower in 
front: .. 5. 
5. Upper BEER of Make one joint audi not longt than Mawit pair; pos- 
terior eye-row straight or even a little recurved ; tarsi I plainly more than 
one half as long as metatarsus ; mandibles geniculate at base a. 
Upper spinnerets of two joints and longer than lower pair 
6. Basal spine on outer side under tibie I and II not Memor to next 
prend larger spiders . 
asal spine on outer side dida tibiæ I and: II reaching to next spine; 
sen spiders 
7. Mandibles plainly genitanti: at RE iis jus adis 1 , caiie 
Mandibles not or barely geniculate at base ; legs very slender 
Tegenaria. 
8. P. M. E. situated fully their diameter apart . . Cicurina. 
P. M. E. less than diameter apart, and closer to the 3: E. Cryphoca. 

Fic. i1. Mna of 
Fic. 12 —Theridiidz ; face and cepha- 
Hahni 
loth 
THERIDIIDE. 
1. Abdomen with hard skin and furnished with several humps ; small spe- 
cies ; sternum truncate behind ; . Ulesanis. 
Abdomen without humps and skin un : i : ; (o b 
2. S. E. widely separate ; posterior eye-row recurved . ; . tr 
S. E. contiguous or nearly so " 
3. Leg IV as long as I; abdomen hr fat, and brósi bie: Epesinus. 
Leg I longer than IV; abdomen globose . . Lathrodectus. 
4. P. M. E. fully four times = diameter apart ; abdome prolonged 
behind ; leg IV about as longas I . : š Spintharus. 
P. M. E. rarely over twice M ein ‘ 3: 
5. A. M. E.larger than P. M. E. and much wider ua dyp rather 
high and concave; legs short, 1V often as en as I; palpi thick in 
female 6. 
A. M. E. rarely lager than P. M. Ex if so (hen not wider apart Au 
6. Abdomen pointed behind and a flat : . Euryopis. 
Abdomen more globose, broadly rounded bead o Dipena. 

