North Ai)ieru'((ii Jiilidw. 21) 



attenuated anteriorly, the anterior four or tlve segments somewhat de- 

 pressed, not smooth. Vertex smooth, Avilli faint reticuhiting lines, 

 sparsely punctate, most numerous between and behind eyes ; median 

 sulcus interrupted ; clypeal foveola3 8-10. Antenna short, not reach- 

 ing the posterior border of first segment. Eyes indistinct, sub-trian- 

 gular ; ocelli, 30-40, arranged in 6 series. Segments, 47-52. First 

 segment with the sides sub-acute, marginate, the anterior border 

 nearly straight, densely punctate ; second segment produced forward 

 into a moderately large sub-quadrate plate. Other segments equally 

 punctate on both divisions, strise moderate, decurved beneath. Last 

 segment pointed, but not extending beyond the anal valves, finely 

 punctate ; anal valves marginate, punctate ; anal scale obtusely an- 

 gled, punctate. Repugnatorial pore placed on the anterior division, 

 large, transverse suture bent. Pairs of feet, 88-100, extending bej^ond 

 the sides of body. Male : the two anterior pairs of feet more robust 

 than the rest ; coxae of the 3-4 pairs most produced. Ventral plate 

 produced into a short, rounded lobe. Genitalia : internal part of 

 the anterior plate not higher than the ventral plate, external part 

 with the tip somewhat rounded, produced backwards and outwards ; 

 posterior plate divided at the base, the outer grooved, through 

 Avhich runs the inner, ends of both rounded and more or less rough- 

 ened. Length of body, 45-100 mm. ; width, 5-10 mm. 



Hahitat. Eastern United States. 



I have examined numerous specimens of this species from 

 Bloomington, Indiana, and one large female from Brooksville, 

 Indiana, collected by Mr. Amos Butler. Specimens 50 mm. 

 long differ in color from the full grown examples, by being dark 

 green. 



Young individuals diii'er from adults as follows : 









Fairs 



of 





Length, 



Width. 



Se.giiientfi. 



Feet. 





Eyea. 



18 mm. 



2 mm. 



42 



76 





18-5 



16.5 mm. 



2 mm. 



41 



65 





21-5 



16 mm. 



2 mm. 



39 



62 





19-5 



8 mm. 



1 mm. 



27 



32 





6-3 



6. 



SPIKOBOLUS 



PENSACOL,^, sp. 



11 ov. 





Dark green above, segments margined with reddish brown ; face, ante- 

 rior and posterior segment bright green ; feet and antennfe lighter 

 than in mnrginatits. Moderatel}^ robust, attenuated before, the tw^elve 

 anterior segments somewhat flattened or crassate beneath, not smooth. 

 Vertex smooth, sparsel}^ punctate ; punctations not more numerous 



