IOWA ACADEMY OF SCIENCES. 191 



profunde angulatosinuatus, medio longitrorsum carinatus dilute flavescens, 

 lineis pluribus tranversis fuscis ornatum. Tegmina latitudine vix 

 duplo longiora, sordide flavescente-pellucida, medio fascia antrorsum 

 augustata et abbreviata albida, anterius a linea, posticea fascia indistincta 

 fuscis terminata, callo rotundato fere apicali ad marginem costalem nerv- 

 isque apicalibus hie illic fuscis. Subtus nigro-varia. Pedis dilute flaves- 

 centes, vitta femorum maculisque fcibiarum nigro-fuscis. 



C. osborni Gillette. (List Hem. Col p 71 ) Female: face two-thirds 

 wider than long, minutely, indistinctly sculptured; clypeus broad at base, 

 gradually tapering to the pointed apex, one-fifth longer than broad, basal 

 suture obsolete; lorw long, nearly as long and half as broad as clypeus; 

 gente narrow, outer margin concave beneath eyes, convex below lorse 

 where they are very narrow, touching the clypeus at the broadest part; 

 front but little longer than broad, superiorly very broadly and evenly 

 rounded. Vertex very slightly transversely depressed, anterior margin 

 carinately elevated, not longer at middle than at eyes. Pronotum trans- 

 versely wrinkled, minutely scabrous, two distinct pits behind anterior 

 margin near the median line, three-fourths wider than long, anterior 

 curvatui'e three-eighths of length. Scutellum finely and transversely 

 wrinkled and minutely scabrous, longer than head and pronotum, twice 

 longer than wide. Elytra with a fine, thickly set, golden pubescence, 

 entirely finely, densely punctured. Color pale rufous throughout, tinged 

 with olive green on pronotum and clavus, beneath more yellowish. 

 Xiength, five and one-half mm. Described from two females. Large but 

 somewhat narrower across the hemelytra than is usual in this genus. 



C. testacea Fitch. (Ninth Rep. St. Ento. N. \'., 393.) Testaceous; 

 scutel rufous; elytra with a polished callous-like black dot near the apex. 

 Length, 20 inches. 



C. pini Fitch. (Ninth Rep. St. Ento. N. Y., 393.) Black; head yellow, 

 with a black band on the anterior margin of the vertex; thorax with a yel- 

 low band anteriorly: elytra with a broad hyaline under mai'gin interrupted 

 in the middle and a black callous dot near the apex. Length 0.14. 



Note — I have been unable to obtain specimens of C. undulata and 

 C. stolida of Uhler from the West Indies, but from their descriptions I am 

 very confident that they will be found to be varieties of obtusa also. So 

 that, with the possible exception of C. brevis, Walker, this paper includes 

 all the present known or described forms of the North American 

 Clastoptera. 



GEOGRAPHICAL DISTRIBUTION. 



Quite a number of interesting facts have been brought to 

 light through a comparative study of geographical distribu- 

 tion. Each species possesses a wide range, while some of the 

 varieties are exceedingly sectional in their distribution. As a 

 whole obtusa has the greater range, occurring from Massachu- 

 setts to California, and from Canada to Georgia, and. probably 

 to the West Indies. Sub-sp. I, obtusa is the most common form 

 in the east and. the only one found in the Mississippi valley, 



