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IOWA ACADEMY OP SCIENCE 
Subgenus pindus Stal. 
Lateral angles of pronotum armed with a sharp spine, the disc with two 
spines. 
a. Anterior lobe of pronotum piceous, posterior stramineous. .19. socius Uhler 
aa. Both lobes of pronotum piceous 20. tetracantJius Stal 
l. Zelus phalangium Fahr. seems to remain unknown. It is not completely 
recognizable from the description but seems to be related to Z. longipes and 
hilohus, differing from them in the immaculate elytra. The description in 
Fabricius, (a) 196, is as follows: “Rufous, with black antennae and legs. 
Related to Z. longipes Linn, and about the same size; head rufous with two 
vertical fuscous lines; antennae long, black; rostrum black, rufous at the base; 
thorax rufous, fuscous above; elytra rufous, immaculate; legs long, black. 
Habitat in American islands.” 
2. Z. EUBiDus Lep. et Serv. {=speciosus Buvm^tricolor Il-Bc^.=^longipes 
Stal. 'WsLlk.=Velia agavis Blaquez=sito*ZZi Leth. et Serv.) Texas, Mexico, Antilles 
and South America. 
3. Z. MACTANS Stal. Cuba. 
4. Z. BiLOBUs Say. Carolina to Texas. 
5. Z. LONGIPES Linn. (=^macropus Gmel.) West Indies. 
6. Z. PiCTiPES Champion. Mexico. 
7. Z. cEEVicALis Stal. Carolina and Florida to Texas, California and Mexico. 
8. Z. PALLENS H.-Sch. Mexico. 
9. Z. EUFicEPS stal. Mexico and southward. 
10. Z. GEASSANS stal. Mexico and Guatemala. 
11. Z. JANUS Stal. {=litigiosus Stal.) Mexico, etc. 
12. Z. suLcicoLLis Champion. Mexico. 
13. Z. suBiMPEEssus Stal. West Indies. 
14. Z. EENAEDii Kol. California. 
15. Z. ExsANGUis Stal ( = luridus Stsil= amlulans cognatus Costa.) 
North Carolina to Colorado, California and southward. 
16. Z. LAEVicoLLis Champion. Mexico and Texas. 
17. Z. NUGAX Stal. Mexico. 
18. Z. MiMUs Stal {=um'bratilis Stal). Mexico. 
19. Z. SOCIUS UKer. Idaho, Dakota, Kansas, Arizona and Illinois. 
20. Z. TETEACANTHus Stal. Mcxico. 
Specimens of the following three species were impossible to obtain and their 
descriptions are of little taxonomic value. 
21. Z. MAEGiNATA Pvovancher (a), recorded from Ottawa is incompletely 
described but traces to Z. cervicalis Stal. It is almost certainly a synonym of 
the latter species. 
22. Z. FEEOX Banks (b), from Arizona, is discussed as Castolus ferox, q. v. 
23. Z, AUDAx Banks (b) has ben found in New York and Virginia. Banks 
suggests that it is related to Z. so^cius Uhler. Brownish yellow; no tubercles 
over base of antennae; posterior lobe of pronotum with middle and lateral 
depressions, the ridges terminating behind in four large conical tubercles. 
