NO. 1573. PARASITIC C0PEP0D8— WILSON. 473 



Baircl (1850), Hoeven (1857), Beneden (1861), A. Scott (1892), and 

 T. Scott (1900) have all given good figures, but with the exception of 

 those published by Iloeven they have ])een almost entirely of the 

 female sex, the male having received very little attention. And yet 

 the male is common and almost every group of these parasites yields 

 several specimens. 



From this list of names it will readily be understood that the 

 descriptions given have been more accurate than those of Cecrops and 

 there is very little to add. For the female little more has been done 

 than to accumulate the facts given by the various authors, with the 

 addition of some details in reference to the reproductive organs. For 

 the male several changes in statement have been found necessary, 

 and much has been added in the way of description, while the chalimus 

 stage of development is entirely new. 



Only a single species of the genus has been described up to the 

 present time, but if we accept the statements and figures given by 

 Hesse for what he has called ''Lsemargus ■ruwricatus''' in the paper 

 already referred to (p. 467), we must conclude that his specimens did 

 not belong to the present species but were new. 



The general body form is radically difi^erent, especially in the male, 

 and there is not a single appendage tlescribed or figured by Hesse 

 whose details agree with those of niuricatus. 



To be sure he made similar mistakes in describing Cecrops, but not 

 so many of them, and while his general inaccuracy is well enough 

 known to prevent the establishment of a new species upon his author- 

 ity alone, yet it does not seem likely that he would have fallen into 

 error in every particular. It will not be surprising, therefore, if future 

 investigation shows that he had a new species, instead of niuricatus as 

 he claimed. 



ORTHAGORISCICOLA MURICATA Kroyer. 

 Plates XL and XLI. 



Lumargus inuricatus Kroyer, 1837, p. -187, pi. v, fms. A to E. — Baird, 1850, p. 295, 

 pi. xxxiv, figs. 3 and 4. — Hoeven, 1857, p. 11, pi. iv, figs. 1 to 10, 12, 14, and 

 15.— Beneden, 1861, pp. 129, 149, pi. xix, figs. 1 1o 4.— A. Scott, 1892, p. 2()6, 

 pi. III.— T. Scott, 1900, p. 158, pi. vi, figs. 39 to 42. 



Orthagoriscicola Diancala Poche, 1902, p. 13. 



Female. — Cara]:)ace trapezoitlal or wedge-shaped, much narrowed 

 anteriorly, with well rounded posterior lobes and a very shallow sinus. 



Frontal plates fused with the carapace; eyes invisible in the adults; 

 lateral margins set with fine conical teeth; grooves on the dorsal 

 surface indistinct but separating a lateral area on either side, which is 

 again divided into a very small cephalic, and a much larger thoracic, 

 portion. The entire dorsal surface is sparsely covered with spines, 

 which are coarser and more prominent on the ridges alongside the 

 grooves. Second, third, and fourth thorax segments free, the first 

 two with a pair of narrow, spine-like projections in the place of lateral 



