Mr. H. W. Bates on the Longicoms of the Amaxtn Valley. 1 1 



EXPLANATION OF PLATE L 



¥ig». \ to7. Terebratula simMota, Broerlii ; ilifierent ages aad 



in form. 7- Interior of the dorsal valre of a ana" 

 Fig. 8. Terebratula minor, Philippi. 

 Fig. 9. TerebraluJina caput -serpenti$, Linn. 9 a. Enlarged illustration. 

 Fig. 10. Megerlia truncata, Linn. 10 a. Enlarged. 

 yig*. 11, 12. Argiope decoUata, Cbemniu. 11 a, Enlaiged §(■>«. 



12. Enlarged interior view of the dorsal valve. 

 Fig. \.i. Thecidium Adawui, Maedonald. 13a,fr. Eu&rged fignca. 

 Fig. 14. RhyuckoneUa b^tortita, Broochi. 



II. — Contribution* to an Inteet Fmma of the Amazon VaUey, 



CoLeoPTCRA : liOxoicoRNEs. By H. W. Bates, Eaq. 



[Continued from vol. liii. p. 164.] 



Genus Hylbttus, dov. gen. 



Body elongate-oblong, more or less depressed, free from sets. 

 Head, as in all the alliol genera, mnch narrower than the thorax, 

 with the anteons approximated at the base; muzzle short and 

 obtuse; lower lobe of the eyes subquadrate. Antennse greatly 

 elongated, sparingly furnished beneath with short bristles. 

 Thorax uneven on the surface ; lateral tubercles prominent and 



{>laced near the middle of the sides. Elytra without smooth 

 ateral keels proceeding from the shoulders. Sterna simple. 

 Terminal abdominal segment in the males with both dorsal and 

 ventral plates notched or emarginated. Ovipositor of the female 

 elongated, tubular; dorsal plate pointed, ventral truncated. 

 Legs moderate ; thighs clavate, thickly so in the males ; basal 

 joint of the posterior tarsi as long as, or longer than, the two 

 following taken together. Fore and middle tarsi in the male 

 dilated and fringed with hairs. 



The chief character which distinguishes this group from Ay»- 

 todrys is the dilatation and ciliation of the anterior and (in less 

 degree) of the intermediate tarsi in the males. Some of the larger 

 species of Nyssudri/s have the male anterior tarsi much broader 

 than those of the hind legs, but in none of them are they fur- 

 nished with the marginal fringe of hairs. The Hyietti are some, 

 what larger insects than the S'yssodrye*, and the shape of their 

 thorax is somewhat different, the lateral spines being in the 

 form of large or distinct tubercles, and plaoui near the middle 

 of the sides. The genus approaches Acanihocmut and Graphi- 

 tunu (groups characteristic of North America and Europe) 

 nearer than any we have yet passed in review. 



Hyleihu ecmobiia, Erichs. 



Lfiopnt cftnobita, Erichson, Consp. Ins. Col. Peruana, p. 145. 



** L. fuscus, dense cinereo-tomentosus, supra flavo irroratu>i, scutello 



